血气形志篇 曰∶夫人之常数，太阳常多血少气，少阳常少血多气，阳明常多血多气，
少阴常少血多气，厥阴常多血少气，太阴常多气少血，此天之常数。
人身之经络气血多少，与天道寒热盛衰相应。气为阳，而配乎热；血为阴，而配乎寒。夫
太阳为天之六气，斯时天气寒盛而热衰，应人手足太阳二经，多血而少气；少阳为天之三气，斯
时天气热盛而寒衰，应人手足少阳二经，少血而多气；阳明为天之五气，斯时天气先热而后寒，
应人手足阳明二经，多气而多血；少阴为天之二气，斯时天气寒少而热多，应人手足少阴二经，
少血而多气；厥阴为天之初气，斯时天气寒盛而热衰，应人手足厥阴二经，多血而少气；太阴为
天之四气，斯时天气热盛而寒衰，应人手足太阴二经，多气而少血，故曰∶天道之常数云尔。
足太阳与少阴为表里，少阳与厥阴为表里，阳明与太阴为表里，是为足之阴阳也。
手太阳与少阴为表里，少阳与心主为表里，阳明与太阴为表里，是为手之阴阳也。
阴阳离合篇 帝曰∶愿闻三阴三阳之离合也。岐伯曰∶圣人南面而立，前曰广明，后曰太冲。
南方丙丁火位，阳气盛明，故曰广明。广，大也，向明而治，故圣人南面而立。然在人身
中则心脏在南，故谓前曰广明。冲脉在北，故后谓太冲。然太冲者，肾脉与冲脉合而盛大，故曰太冲。
太冲之地，名曰少阴，少阴之上，名曰太阳。
肾脏为阴，膀胱腑为阳。阴气在下，阳气在上，此为表里合一之经气。
太阳根起于至阴，结于命门，名曰阴中之阳。
太阳居少阴之地，故曰阴中之阳。
中身而上，名曰广明，广明之下，名曰太阴。
身之上曰广明，身之下曰太阴。又曰心脏下则太阴脾脏是也。
太阴之前，名曰阳明。
阳明胃脉行脾脉之前，太阴脾脉行胃脉之后。
阳明根起于厉兑，名曰阴中之阳。
阳明居太阴之前，故曰阴中之阳。
厥阴之表，名曰少阳。
少阳居厥阴之表，为阴中之少阳。
少阳根起于窍阴，名曰阴中之少阳。是故三阳之离合也。
离，谓别离应用。合，为配合于阴。别离则正位于三阳，配合则表里为脏腑。
太阳为开，阳明为阖，少阳为枢。
太阳司动静之机，故为开。阳明执禁固之权，故为阖。少阳司动静之微，故为枢。
三经者，不得相失也，搏而勿浮，命曰一阳。
搏而勿浮，为有胃气之脉也。既有胃气则三阳齐一而不相失也，故命曰一阳。
愿闻三阴何如？岐伯曰∶外者为阳，内者为阴，然则中为阴，（中则内也。）其冲在下，
名曰太阴。
冲脉在脾之下，故言在下，皆言脏位及经脉之次也。
太阴根起于隐白，名曰阴中之阴。太阴之后，名曰少阴。
脾脏之下近后，则肾之位。太阴脉起于大指端，少阴脉起于小指下。
少阴根起于涌泉，名曰阴中之少阴，少阴之前，名曰厥阴。
厥阴根起于大敦，名曰阴中之绝阴。是故三阴之离合也，太阴为开，厥阴为阖，少阴为枢。
三经者，不得相失，博而勿沉，名曰一阴。
厥者尽也，阴至此而尽，故曰阴中之绝阴。胃脏之前，近肝之位，厥阴脉交出太阴之后。
搏而勿沉，不至于弱伏，是亦胃气之脉者也。
经脉篇 手太阴肺经之脉，起于中焦，下络大肠，还循胃口，上鬲属肺，从肺系横出
腋下，循 内，行少阴心主之前，循臂内上骨下廉，入寸口，上鱼际，循鱼际，出大指之端；其
支者，从腕后出次指内廉，出其端。
手阳明大肠经之脉，起于大指次指之端，循指上廉，出合谷两骨之间，上入两筋之中，循臂
上廉，入肘外廉，循 外前廉，上肩，出 骨之前廉，上出柱骨之会于大椎，下入缺盆，络肺下
鬲属大肠；其支别者，从缺盆上颈贯颊，入下齿缝中，还出侠口，交人中，左之右，右之左，上侠鼻孔。
足阳明胃之脉，起于鼻交 中，旁约大肠之脉，下循鼻外，入上齿中，还出侠口环唇，下交
承浆，却循颐下后廉，出大迎，循颊车，上耳前，过客主人，循发际，至额颅；其支别者，从大
迎前下人迎，循喉咙，入缺盆，下鬲属胃络脾；其直者，从缺盆下乳内廉，下侠脐，入气冲；其
支者，起胃口，下循腹里，下至气冲而合，以
下髀关，抵伏免，下入膝膑中，下循 外廉，下足跗，入中指内间；其支者，下膝三寸而别，以
下入中指外间；其支者，别跗上，入大指间，出其端。
足太阴脾经之脉，起于大指之端，循指侧白肉际，过核骨后，上内踝前廉，上 内，循 骨
后，交出厥阴之前，上循膝股内前廉，入腹属脾络胃，上鬲挟咽，连舌本，散舌下；其支别者，
复从胃，别上鬲，注心中。
手少阴心经之脉，起于心中，出属心系，下鬲络小肠；其支者，从心系侠咽，系目；其直者，
复从心系却上肺，出腋下，下循 肉后廉，行太阴心主之后，下肘内廉，循臂内后廉，抵掌后兑
骨之端，入掌内后廉，循小指之内出其端。
手太阳小肠经之脉，起于小指之端，循手外侧上腕，出踝中，直上循臂骨下廉，出肘内侧两
筋之间，上循 外廉，出肩解，绕肩胛，交肩上，入缺盆络心，循咽下鬲，抵胃属小肠；其支别
者，从缺盆循颈上颊，至目锐 ，却入耳中，其支者，别循颊上 抵鼻，至目内 。
足太阳膀胱经之脉，起于目内 ，上额交巅上；其支别者，从巅至耳上角；其直行者，从巅
入脑，还出别下项，循肩膊后，侠脊抵腰中，入循膂，络肾属膀胱；其支别者，从腰中下贯臀，
入中；其支别，从膊内左右，别下贯胛，侠脊内，过髀枢，循髀外从后廉下合 中，以下贯
内出外踝之后，循京骨
至小指外侧端。
足少阴肾经之脉，起于足小指之下，斜趋足心，出然谷之下，循内踝之后，别入跟中，上
内，出 内廉，上股内后廉，贯脊属肾络膀胱；其直者，从肾上贯肝鬲，入肺中，循喉咙，挟舌
本；其支者，从肺出络心，注胸中。
手厥阴心包络之脉，起于胸中，出属心包，下鬲历络三焦；其支者，循胸出胁，下腋三寸，
上抵腋下，下循 内，行太阴少阴之间，入肘中，下臂行两筋之间，入掌中，循中指出其端；其
支别者，从掌中，循小指次指出其端。
手少阳三焦经之脉，起于小指次指之端，上出两指之间，循手表腕，出臂两骨之间，上贯肘，
循外上肩，交出足少阳之后，入缺盆，布膻中，散络心包，下鬲循属三焦；其支者，从膻中上
出缺盆，上项，挟耳后直上，出耳上角，以屈下颊至 ；其支者，从耳后入耳中，却出至目锐 。
足少阳胆经之脉，起于目锐 ，上抵头角，下耳后，循颈行手少阳之前，至肩上，却交出少
阳之后，入缺盆；其支者，从耳后入耳中，出走耳前，至目锐 后，下大迎，合手少阳于 ，下
临颊车，下颈合缺盆，下胸中，贯鬲络肝属胆，循胁里，出气冲，下毛际，横入髀厌中；其直者，
从缺盆下腋，循胸过季胁，
下合髀厌中，以下循髀外，出膝外廉，下外辅骨之前，直下抵绝骨之端，下出外踝之前，循足跗
之上，入小指次指之间；其支别者，别跗上入大指，循歧骨内出其端，还贯入爪甲，出三毛。
足厥阴肝经之脉，起于大指聚毛之上，循足 上廉，去内踝一寸，上踝三寸，交出太阴之后，
上内廉，循股入阴中，环阴器，抵少腹，挟胃属肝络胆，上贯鬲，布胁肋，循喉咙之后，上入
颃颡，连目系，上出额，与督脉会于巅；其支者，从目系下颊里，环唇内；其支者，复从肝别贯
鬲，上注肺。
督脉起于下极之余，并于脊里，上至风府入脑，上巅循额，至鼻柱，属阳脉之海。
任脉起于中极之下，以上毛际，循腹里上关元，至喉咙，属阴脉之海。
《血气形志篇》中说：人体的常数规律是，太阳经通常多血少气，少阳经通常少血多气，阳明经通常多血多气，少阴经通常少血多气，厥阴经通常多血少气，太阴经通常多气少血，这是上天的恒定规律。
人身经络气血的多少，与天道寒热盛衰的变化相应。气属于阳，对应热；血属于阴，对应寒。太阳对应天之六气中的寒气，此时天气寒冷旺盛而热气衰退，对应人的手足太阳二经，表现为多血少气；少阳对应天之三气中的火气，此时天气炎热旺盛而寒气衰退，对应人的手足少阳二经，表现为少血多气；阳明对应天之五气中的燥气，此时天气先热后寒，对应人的手足阳明二经，表现为多气多血；少阴对应天之二气中的热气，此时天气寒冷较少而热气较多，对应人的手足少阴二经，表现为少血多气；厥阴对应天之初气中的风气，此时天气寒冷旺盛而热气衰退，对应人的手足厥阴二经，表现为多血少气；太阴对应天之四气中的湿气，此时天气炎热旺盛而寒气衰退，对应人的手足太阴二经，表现为多气少血，所以说：这是天道的恒定规律。
足太阳膀胱经与足少阴肾经互为表里，足少阳胆经与足厥阴肝经互为表里，足阳明胃经与足太阴脾经互为表里，这构成了足部的阴阳关系。手太阳小肠经与手少阴心经互为表里，手少阳三焦经与手厥阴心包经互为表里，手阳明大肠经与手太阴肺经互为表里，这构成了手部的阴阳关系。
《阴阳离合篇》中黄帝说：我想听听三阴三阳离合的道理。岐伯说：圣人面向南方站立，前面称为广明，后面称为太冲。南方属丙丁火位，阳气盛大光明，所以称为广明。“广”意为大，面向光明而治理天下，所以圣人面向南方站立。然而在人体内部，心脏位于前方（南），所以称前面为广明。冲脉位于后方（北），所以后面称为太冲。所谓太冲，是指肾脉与冲脉汇聚而盛大，所以称为太冲。太冲之地，名为少阴，少阴之上，名为太阳。
肾脏属阴，膀胱腑属阳。阴气在下，阳气在上，这就是表里相合的经脉之气。
太阳经根起于至阴穴，结于命门（眼睛），名为阴中之阳。
太阳经居于少阴之地，所以称为阴中之阳。
身体中部以上，名为广明，广明之下，名为太阴。
身体上部称为广明，身体下部称为太阴。又说，心脏之下即是太阴脾脏。
太阴之前，名为阳明。
阳明胃脉行于脾脉之前，太阴脾脉行于胃脉之后。
阳明经根起于厉兑穴，名为阴中之阳。
阳明经居于太阴之前，所以称为阴中之阳。
厥阴之表，名为少阳。
少阳经居于厥阴之表，为阴中之少阳。
少阳经根起于窍阴穴，名为阴中之少阳。这就是三阳经的离合道理。
“离”，指分别应用；“合”，指配合于阴。分离则正位于三阳经，配合则表里构成脏腑关系。
太阳经主开，阳明经主阖，少阳经主枢。
太阳经主管动静之机，所以称为开。阳明经执掌固守之权，所以称为阖。少阳经主管动静之细微变化，所以称为枢。
这三条经脉，不能相互背离，脉象搏动有力而不浮散，这就叫做“一阳”。
脉象搏动有力而不浮散，是有胃气的脉象。既然有胃气，那么三阳经就齐一而不相互背离，所以称为“一阳”。
我想听听三阴经的情况如何？岐伯说：外部为阳，内部为阴，然而中间部分属阴，（中间即内部。）其冲脉在下方，名为太阴。
冲脉在脾脏之下，所以说在下方，这里都是指脏腑位置及经脉的次序。
太阴经根起于隐白穴，名为阴中之阴。太阴之后，名为少阴。
脾脏之下靠近后方，就是肾脏的位置。太阴脉起于大拇指端，少阴脉起于小趾下。
少阴经根起于涌泉穴，名为阴中之少阴，少阴之前，名为厥阴。
厥阴经根起于大敦穴，名为阴中之绝阴。这就是三阴经的离合道理，太阴经主开，厥阴经主阖，少阴经主枢。
这三条经脉，不能相互背离，脉象博大而不沉伏，这就叫做“一阴”。
“厥”意为尽，阴气至此而尽，所以称为阴中之绝阴。胃脏之前，靠近肝脏位置，厥阴脉交叉出于太阴脉之后。
脉象博大而不沉伏，不至于微弱潜伏，这也是有胃气的脉象。
《经脉篇》记载：手太阴肺经的经脉，起于中焦，向下联络大肠，返回沿着胃的上口，向上穿过膈肌，归属于肺，从肺系（气管、喉咙等）横出腋下，沿上臂内侧下行，行在手少阴心经和手厥阴心包经之前，沿前臂内侧上骨下缘，进入寸口，上行至鱼际，沿鱼际，出于大拇指末端；它的支脉，从腕后出于食指内侧边缘，到达其末端。
手阳明大肠经的经脉，起于食指末端，沿食指上缘，出于合谷穴两骨之间，上行进入两筋之中，沿前臂上缘，进入肘部外侧，沿上臂外侧前缘，上行肩部，出于肩峰前缘，上行出于柱骨（脊椎）会合处的大椎穴，向下进入缺盆，联络肺，向下穿过膈肌，归属于大肠；它的分支，从缺盆上行颈部，贯穿面颊，进入下齿缝中，返回出来夹持口角，交叉于人中穴，左侧走向右侧，右侧走向左侧，上行夹持鼻孔两侧。
足阳明胃经的经脉，起于鼻翼旁交于鼻根中，旁边约束大肠经的脉气，向下沿鼻外侧，进入上齿中，返回出来夹持口角环绕嘴唇，向下交于承浆穴，然后沿下颌后下缘，出于大迎穴，沿颊车穴，上行耳前，经过客主人穴（上关穴），沿发际，到达额颅；它的分支，从大迎穴前下行到人迎穴，沿喉咙，进入缺盆，向下穿过膈肌，归属于胃，联络脾；它的直行者，从缺盆下行沿乳内廉，向下夹脐两旁，进入气冲穴；它的分支，起于胃口，向下沿腹内，下行至气冲穴与直行者汇合，由此向下经过髀关穴，抵达伏兔穴，下行进入膝盖髌骨中，向下沿小腿外侧前缘，下行至足背，进入中趾内侧间；它的分支，从膝下三寸处分出，向下进入中趾外侧间；它的分支，别出于足背上，进入大趾间，出于其末端。
足太阴脾经的经脉，起于大拇指末端，沿脚趾侧白肉际，经过核骨（第一跖骨基底部）后方，上行内踝前缘，沿小腿内侧前缘，沿胫骨后缘，交叉出于足厥阴肝经之前，上行沿膝股内侧前缘，进入腹部，归属于脾，联络胃，向上穿过膈肌，夹持咽喉，连系舌根，散布于舌下；它的分支，又从胃分出，上行穿过膈肌，注入心中。
手少阴心经的经脉，起于心中，出来归属于心系（心脏与其他脏器相连的组织），向下穿过膈肌，联络小肠；它的分支，从心系夹持咽喉，连系目系（眼球连系于脑的脉络）；它的直行者，又从心系退回上行入肺，出于腋下，沿上臂内侧后缘，行于手太阴肺经和手厥阴心包经之后，下行肘内侧，沿前臂内侧后缘，抵掌后豌豆骨端，进入掌内后缘，沿小指内侧出于其末端。
手太阳小肠经的经脉，起于小指末端，沿手外侧上行腕部，出于踝中（尺骨茎突），直上沿前臂骨下缘，出于肘内侧两筋之间，沿上臂外侧后缘，出于肩关节解（肩井穴附近），绕肩胛，交会于肩上，进入缺盆，联络心脏，沿食管下行穿过膈肌，抵胃，归属于小肠；它的分支，从缺盆沿颈部上行面颊，至外眼角，却入耳中；它的另一分支，别行沿面颊上行至鼻，至内眼角。
足太阳膀胱经的经脉，起于内眼角，上行额部，交会于头顶；它的分支，从头顶至耳上角；它的直行者，从头顶入络脑，复出分别下行项后，沿肩膊后，夹脊柱抵腰中，进入循行于脊内肌肉，联络肾脏，归属于膀胱；它的分支，从腰中下行贯穿臀部，进入腘窝中；它的另一分支，从肩胛内左右别行，向下贯穿肩胛，夹脊柱内侧，经过髋关节，沿大腿外侧后缘下行，与腘窝中的经脉汇合，由此向下通过小腿肚，出于外踝后方，沿京骨穴，至小趾外侧端。
足少阴肾经的经脉，起于足小趾之下，斜趋足心，出于然谷穴之下，沿内踝后方，别入跟中，上行小腿内侧，出于内踝上缘，上行大腿内侧后缘，贯穿脊柱，归属于肾，联络膀胱；它的直行者，从肾上行贯穿肝脏和膈肌，入肺中，沿喉咙，夹持舌根；它的分支，从肺出来联络心脏，注入胸中。
手厥阴心包络的经脉，起于胸中，出来归属于心包，向下穿过膈肌，依次联络上、中、下三焦；它的分支，沿胸而出胁部，下行腋下的三寸处，上行抵腋下，沿上臂内侧下行，行于手太阴肺经和手少阴心经之间，进入肘中，下行前臂行于两筋之间，进入掌中，沿中指指出其末端；它的分支，从掌中出于无名指末端。
手少阳三焦经的经脉，起于无名指末端，上行出于两指之间，沿手腕背面，出于前臂两骨之间，上行贯穿肘部，沿上臂外侧上行肩部，交叉出于足少阳胆经之后，进入缺盆，分布于膻中，散络心包，向下穿过膈肌，依次归属于上、中、下三焦；它的分支，从膻中上行出于缺盆，上项部，夹耳后直上，出于耳上角，以屈曲下行至面颊部至眶下；它的另一分支，从耳后入耳中，却出至外眼角。
足少阳胆经的经脉，起于外眼角，上行抵头角，下行耳后，沿颈部行于手少阳三焦经之前，至肩上，却交叉出于少阳经之后，进入缺盆；它的分支，从耳后入耳中，出走耳前，至外眼角后方，下行大迎穴，与手少阳三焦经会合于颧骨下，下行临颊车穴，下行颈部合于缺盆，下行胸中，穿过膈肌，联络肝脏，归属于胆，沿胁肋内，出于气冲穴，下行毛际，横向进入髋关节中；它的直行者，从缺盆下行腋下，沿胸部过季胁，向下合于髋关节中，由此沿大腿外侧下行，出于膝外侧，下行外辅骨（腓骨）之前，直下抵绝骨（腓骨下端）之端，下行出于外踝之前，沿足背之上，进入第四趾间；它的分支，别出于足背上，进入大趾，沿歧骨（跖骨间隙）内出于其末端，还贯入爪甲，出于丛毛（三毛）。
足厥阴肝经的经脉，起于大趾丛毛之上，沿足背内侧上缘，距内踝一寸处，上行踝上三寸，交叉出于足太阴脾经之后，沿大腿内侧前缘，沿股部进入阴毛中，环绕生殖器，抵少腹，夹胃，归属于肝，联络胆，向上穿过膈肌，分布于胁肋，沿喉咙之后，上行进入颃颡（鼻咽部），连系目系，上行出于额部，与督脉会于头顶；它的分支，从目系下行面颊里，环绕唇内；它的另一分支，又从肝分出，贯穿膈肌，上行注入肺中。
督脉起于下极（尾骨端）之余，并行于脊柱里，上行至风府入脑，上行头顶沿额部，至鼻柱，属于阳脉之海。
任脉起于中极穴之下，以上行至毛际，沿腹内上行至关元穴，至喉咙，属于阴脉之海。
The *Xue Qi Xing Zhi Pian* (Chapter on Blood, Qi, Constitution, and Will) states: The constant laws of the human body are that the Taiyang (Greater Yang) channel usually has abundant blood and deficient qi; Shaoyang (Lesser Yang) usually has deficient blood and abundant qi; Yangming (Bright Yang) usually has abundant blood and abundant qi; Shaoyin (Lesser Yin) usually has deficient blood and abundant qi; Jueyin (Terminal Yin) usually has abundant blood and deficient qi; and Taiyin (Greater Yin) usually has abundant qi and deficient blood. These are the constant laws of Heaven.
The abundance or deficiency of meridians, blood, and qi in the human body corresponds to the waxing and waning of cold and heat in the Heavenly Dao. Qi belongs to Yang and corresponds to Heat; Blood belongs to Yin and corresponds to Cold. Taiyang corresponds to the Cold Qi among the Six Qi of Heaven. At this time, the weather is predominantly cold and Heat is declining, corresponding to the Hand and Foot Taiyang channels, which exhibit abundant blood and deficient qi. Shaoyang corresponds to the Fire Qi among the Three Qi of Heaven. At this time, the weather is predominantly hot and Cold is declining, corresponding to the Hand and Foot Shaoyang channels, which exhibit deficient blood and abundant qi. Yangming corresponds to the Dryness Qi among the Five Qi of Heaven. At this time, the weather is first hot then cold, corresponding to the Hand and Foot Yangming channels, which exhibit abundant qi and abundant blood. Shaoyin corresponds to the Heat Qi among the Two Qi of Heaven. At this time, Cold is less prevalent and Heat is more prevalent, corresponding to the Hand and Foot Shaoyin channels, which exhibit deficient blood and abundant qi. Jueyin corresponds to the Wind Qi, the initial Qi of Heaven. At this time, Cold is predominant and Heat is declining, corresponding to the Hand and Foot Jueyin channels, which exhibit abundant blood and deficient qi. Taiyin corresponds to the Dampness Qi among the Four Qi of Heaven. At this time, Heat is predominant and Cold is declining, corresponding to the Hand and Foot Taiyin channels, which exhibit abundant qi and deficient blood. Thus it is said: these are the constant laws of the Heavenly Dao.
The Foot Taiyang Bladder Channel and the Foot Shaoyin Kidney Channel are exterior-interior pairs; the Foot Shaoyang Gallbladder Channel and the Foot Jueyin Liver Channel are exterior-interior pairs; the Foot Yangming Stomach Channel and the Foot Taiyin Spleen Channel are exterior-interior pairs. These constitute the Yin-Yang relationships of the lower limbs. The Hand Taiyang Small Intestine Channel and the Hand Shaoyin Heart Channel are exterior-interior pairs; the Hand Shaoyang Sanjiao Channel and the Hand Jueyin Pericardium Channel are exterior-interior pairs; the Hand Yangming Large Intestine Channel and the Hand Taiyin Lung Channel are exterior-interior pairs. These constitute the Yin-Yang relationships of the upper limbs.
In the *Yin Yang Li He Pian* (Chapter on the Separation and Union of Yin and Yang), the Yellow Emperor asked: I wish to hear about the separation and union of the Three Yin and Three Yang. Qibo replied: When a sage stands facing South, the front is called Guangming (Broad Brightness), and the back is called Taichong (Great Surge). The South corresponds to the Bing-Ding Fire position, where Yang Qi is abundant and bright, hence called Guangming. "Guang" means large; governing while facing brightness, the sage stands facing South. However, within the human body, the Heart is located anteriorly (South), so the front is termed Guangming. The Chong Mai (Penetrating Vessel) is located posteriorly (North), so the back is termed Taichong. Taichong refers to the convergence and flourishing of the Kidney Meridian and the Penetrating Vessel, hence called Taichong. The place of Taichong is named Shaoyin; above Shaoyin is named Taiyang.
The Kidney is Yin, and the Bladder Fu-organ is Yang. Yin Qi is below, Yang Qi is above; this constitutes the meridian qi of exterior-interior unity.
The Taiyang channel originates at Zhiyin (BL67), terminates at Mingmen (the eyes), and is named Yang within Yin.
Because the Taiyang channel resides in the territory of Shaoyin, it is called Yang within Yin.
The middle and upper body is named Guangming; below Guangming is named Taiyin.
The upper body is called Guangming, and the lower body is called Taiyin. It is also said that below the Heart lies the Taiyin Spleen.
Anterior to Taiyin is named Yangming.
The Yangming Stomach Meridian runs anterior to the Spleen Meridian, and the Taiyin Spleen Meridian runs posterior to the Stomach Meridian.
The Yangming channel originates at Lidui (ST45) and is named Yang within Yin.
Because the Yangming channel resides anterior to Taiyin, it is called Yang within Yin.
The exterior of Jueyin is named Shaoyang.
The Shaoyang channel resides at the exterior of Jueyin and is named Lesser Yang within Yin.
The Shaoyang channel originates at Xiaoyin (GB44) and is named Lesser Yang within Yin. This is the separation and union of the Three Yang channels.
"Separation" (Li) refers to distinct application; "Union" (He) refers to coordination with Yin. Separated, they occupy their proper positions as the Three Yang; united, their exterior-interior relationship forms the Zang-Fu organs.
Taiyang governs Opening (Kai); Yangming governs Closing (He); Shaoyang governs Pivot (Shu).
Taiyang manages the mechanism of movement and stillness, thus it is the Opening. Yangming holds the authority of consolidation, thus it is the Closing. Shaoyang manages the subtleties of movement and stillness, thus it is the Pivot.
These three channels must not deviate from each other. If the pulse is firm but not floating, it is called One Yang.
"Firm but not floating" indicates a pulse with Stomach Qi. With Stomach Qi present, the Three Yang are unified and do not deviate, hence called One Yang.
I wish to know about the Three Yin. Qibo replied: The exterior is Yang, the interior is Yin. However, the middle is Yin (Middle implies Interior). Its Chong Mai is below, named Taiyin.
The Penetrating Vessel is below the Spleen, hence described as "below." This refers to the positions of the Zang organs and the sequence of the meridians.
The Taiyin channel originates at Yinbai (SP1) and is named Yin within Yin. Posterior to Taiyin is named Shaoyin.
Below and posterior to the Spleen is the location of the Kidney. The Taiyin meridian originates at the tip of the great toe; the Shaoyin meridian originates below the little toe.
The Shaoyin channel originates at Yongquan (KI1) and is named Lesser Yin within Yin. Anterior to Shaoyin is named Jueyin.
The Jueyin channel originates at Dacun (LR1) and is named Terminal Yin within Yin. This is the separation and union of the Three Yin channels: Taiyin governs Opening, Jueyin governs Closing, and Shaoyin governs Pivot.
These three channels must not deviate from each other. If the pulse is broad but not sinking, it is called One Yin.
"Jue" means exhaustion; Yin reaches its limit here, hence called Terminal Yin within Yin. Anterior to the Stomach organ, near the Liver's position, the Jueyin meridian crosses out posterior to the Taiyin meridian.
"Broad but not sinking," not weak or hidden, is also a pulse with Stomach Qi.
The *Jing Mai Pian* (Chapter on the Meridians) records: The Hand Taiyin Lung Meridian originates in the Middle Jiao, descends to connect with the Large Intestine, returns along the stomach opening, ascends through the diaphragm, and enters the Lung. From the lung system (trachea and larynx), it emerges horizontally under the axilla, runs down the medial aspect of the arm, anterior to the Hand Shaoyin Heart and Hand Jueyin Pericardium channels, follows the medial border of the radius, enters the Cun Kou (radial artery), ascends to the Thenar eminence (Yu Ji), follows the margin of the thenar eminence, and exits at the tip of the thumb. Its branch emerges from behind the wrist, exits along the medial border of the index finger, and reaches its tip.
The Hand Yangming Large Intestine Meridian originates at the tip of the index finger, follows the radial border of the finger, emerges between the metacarpal bones at Hegu (LI4), ascends between the two tendons, follows the radial border of the forearm, enters the lateral aspect of the elbow, follows the anterior border of the lateral aspect of the upper arm, ascends to the shoulder, emerges anterior to the acromion, ascends to meet the vertebral column at Dazhui (GV14), descends into the Supraclavicular Fossa (Quepen), connects with the Lung, descends through the diaphragm, and enters the Large Intestine. Its branch emerges from the Supraclavicular Fossa, ascends the neck, pierces the cheek, enters the lower gum, returns to emerge flanking the mouth, crosses at Renzhong (GV26), left to right and right to left, and ascends flanking the nostrils.
The Foot Yangming Stomach Meridian originates at the side of the nose, crossing the nasal root, adjacent to the Large Intestine meridian, descends along the lateral nose, enters the upper gum, returns to emerge flanking the mouth and encircling the lips, descends to intersect Chengjiang (CV24), then follows the mandibular angle posteriorly, emerges at Daying (ST5), follows Jiache (ST6), ascends anterior to the ear, passes through Shangguan (ST7), follows the hairline, and reaches the forehead. Its branch descends from anterior to Daying to Renying (ST9), follows the throat, enters the Supraclavicular Fossa, descends through the diaphragm, enters the Stomach, and connects with the Spleen. Its main trunk descends from the Supraclavicular Fossa along the medial aspect of the breast, descends flanking the umbilicus, and enters Qichong (ST30). Another branch originates from the stomach opening, descends within the abdomen, and meets the main trunk at Qichong. From there, it descends to Bituan (ST31), reaches Futu (ST32), descends into the knee patella, follows the lateral border of the leg, descends to the dorsum of the foot, and enters the space between the toes of the middle finger. Another branch diverges three cun below the knee, descending to enter the lateral space of the middle toe. Another branch diverges from the dorsum of the foot, enters the space between the big toe, and exits at its tip.
The Foot Taiyin Spleen Meridian originates at the tip of the great toe, follows the lateral white flesh margin of the toe, passes posterior to the medial malleolus prominence (medial cuneiform base), ascends anterior to the medial malleolus, ascends along the medial aspect of the lower leg, follows the posterior border of the tibia, crosses anterior to the Foot Jueyin Liver Channel, ascends along the anterior medial aspect of the knee and thigh, enters the abdomen, enters the Spleen, and connects with the Stomach. It ascends through the diaphragm, flanks the pharynx, connects with the root of the tongue, and scatters under the tongue. Its branch diverges from the Stomach, ascends through the diaphragm, and pours into the Heart.
The Hand Shaoyin Heart Meridian originates in the Heart, emerges to connect with the Heart System, descends through the diaphragm, and connects with the Small Intestine. Its branch emerges from the Heart System, flanks the pharynx, and connects with the Eye System. Its main trunk returns from the Heart System, ascends to the Lung, emerges under the axilla, follows the posterior border of the medial aspect of the arm, runs posterior to the Hand Taiyin Lung and Hand Jueyin Pericardium channels, descends to the medial aspect of the elbow, follows the posterior medial border of the forearm, reaches the end of the pisiform bone at the wrist, enters the posterior medial aspect of the palm, follows the medial aspect of the little finger, and exits at its tip.
The Hand Taiyang Small Intestine Meridian originates at the tip of the little finger, follows the ulnar side of the hand up to the wrist, emerges at the styloid process, goes straight up along the ulnar border of the forearm, emerges between the two tendons at the medial aspect of the elbow, follows the posterior lateral border of the upper arm, emerges at the shoulder joint, winds around the scapula, crosses the shoulders, enters the Supraclavicular Fossa, connects with the Heart, follows the pharynx, descends through the diaphragm, reaches the Stomach, and enters the Small Intestine. Its branch emerges from the Supraclavicular Fossa, follows the neck to the cheek, reaches the outer canthus, and enters the ear. Another branch diverges from the cheek, ascends to the nose, and reaches the inner canthus.
The Foot Taiyang Bladder Meridian originates at the inner canthus, ascends to the forehead, and intersects at the vertex. Its branch goes from the vertex to the supraorbital ridge. Its main trunk enters the brain from the vertex, emerges separately to descend the nape, follows the posterior shoulder blades, flanks the spine to reach the waist, enters the paraspinal muscles, connects with the Kidneys, and enters the Bladder. Its branch descends from the waist through the buttocks into the popliteal fossa. Another branch diverges from the medial aspect of the shoulder blades, descends through the scapula, flanks the spine internally, passes the hip joint, follows the posterior lateral aspect of the thigh, and joins the popliteal channel. From there, it descends through the calf, emerges posterior to the lateral malleolus, follows Jinggu (BL64), and reaches the lateral tip of the little toe.
The Foot Shaoyin Kidney Meridian originates below the little toe,斜趋 (slants towards) the sole of the foot, emerges below Rangu (KI2), follows the posterior aspect of the medial malleolus, diverges into the heel, ascends along the medial aspect of the lower leg, emerges at the medial border of the medial malleolus, ascends along the posterior medial aspect of the thigh, penetrates the spine, enters the Kidneys, and connects with the Bladder. Its main trunk ascends from the Kidneys, penetrates the Liver and Diaphragm, enters the Lung, follows the pharynx, and flanks the root of the tongue. Its branch emerges from the Lung, connects with the Heart, and pours into the Chest.
The Hand Jueyin Pericardium Meridian originates in the Chest, emerges to connect with the Pericardium, descends through the diaphragm, and sequentially connects with the Upper, Middle, and Lower Jiao. Its branch follows the chest out to the hypochondrium, descends three cun below the axilla, ascends to the axilla, follows the medial aspect of the arm, runs between the Hand Taiyin Lung and Hand Shaoyin Heart channels, enters the elbow, descends the forearm between the two tendons, enters the palm, follows the middle finger to its tip. Its branch emerges from the palm, follows the ring finger to its tip.
The Hand Shaoyang Sanjiao Meridian originates at the tip of the ring finger, ascends between the fingers, follows the dorsal wrist, emerges between the two bones of the forearm, ascends through the elbow, follows the lateral aspect of the upper arm to the shoulder, crosses posterior to the Foot Shaoyang Gallbladder Channel, enters the Supraclavicular Fossa, distributes in the Shanzhong (Chest Center), scatters to connect with the Pericardium, and descends through the diaphragm to connect with the Sanjiao. Its branch emerges from the Shanzhong, ascends to the Supraclavicular Fossa, ascends the neck, flanks the ear, goes straight up to the supraorbital ridge, curves down to the cheekbone. Another branch enters the ear from behind the ear, emerges to the outer canthus.
The Foot Shaoyang Gallbladder Meridian originates at the outer canthus, ascends to the temporal angle, descends behind the ear, follows the neck anterior to the Hand Shaoyang Sanjiao Channel, reaches the shoulder, crosses posterior to the Shaoyang Channel, and enters the Supraclavicular Fossa. Its branch enters the ear from behind the ear, emerges anterior to the ear, reaches the posterior outer canthus, descends to Daying (ST5), merges with the Hand Shaoyang at the cheekbone, descends to Jiache (ST6), descends the neck to merge with the Supraclavicular Fossa, descends into the Chest, penetrates the diaphragm, connects with the Liver, enters the Gallbladder, follows the interior of the hypochondrium, emerges at Qichong (ST30), descends to the pubic region, and transversely enters the hip joint. Its main trunk descends from the Supraclavicular Fossa under the axilla, follows the chest past the costal margin, merges with the hip joint, follows the lateral aspect of the thigh, emerges at the lateral aspect of the knee, descends anterior to the fibula, reaches the end of the fibula, emerges anterior to the lateral malleolus, follows the dorsum of the foot, and enters the space between the fourth and fifth toes. Its branch diverges from the dorsum of the foot, enters the big toe, follows the intermetatarsal space to its tip, penetrates the nail bed, and emerges at the tuft of hair.
The Foot Jueyin Liver Meridian originates above the tuft of hair on the big toe, follows the medial border of the dorsum of the foot, one cun from the medial malleolus, ascends three cun above the ankle, crosses posterior to the Foot Taiyin Spleen Channel, follows the medial aspect of the thigh, enters the pubic region, circles the genitalia, reaches the lower abdomen, flanks the Stomach, enters the Liver, and connects with the Gallbladder. It ascends through the diaphragm, distributes in the hypochondrium, follows the posterior pharynx, ascends to the nasopharynx (Hangsang), connects with the eye system, ascends to the forehead, and meets the Du Mai at the vertex. Its branch descends from the eye system through the cheek, encircles the inside of the lips. Another branch diverges from the Liver, penetrates the diaphragm, and pours into the Lung.
The Du Mai (Governing Vessel) originates from the coccyx, runs parallel within the spinal column, ascends to Fengfu (GV16) to enter the brain, ascends to the vertex, follows the forehead to the nasal bridge, and is the Sea of Yang Channels.
The Ren Mai (Conception Vessel) originates below Zhongji (CV3), ascends to the pubic hairline, follows the interior of the abdomen to Guanyuan (CV4), reaches the throat, and is the Sea of Yin Channels.