三部从鱼际至高骨得一寸，名曰寸口；从寸口至尺，名曰尺泽，故曰尺中；寸后尺前名
曰关，阳出阴入，以关为界。又云∶阴得尺内一寸，阳得寸内九分，从寸口入六分为关分，
从关分又入六分为尺分，故三部共得一寸九分。
心部在左手寸口，属手少阴经，与小肠手太阳经合。
肝部在左手关上，属足厥阴经，与胆足少阳经合。
肾部在左手尺中，属足少阴经，与膀胱足太阳经合。
肺部在右手寸口，属手太阴经，与大肠手阳明经合。
脾部在右手关上，属足太阴经，与胃足阳明经合。
右肾在右手尺中，属手厥阴(心包)经，与三焦手少阳经合。
手少阴之脉起于心中，出属心系，下膈，络小肠；其支者，从心系上挟咽，系目；其直
者，复从心系却上肺，出腋下，下循 内后廉，行太阴心主之后，下肘内廉，循臂内后廉，
抵掌后兑骨之端，入掌内廉，循小指之内出其端。
手太阳之脉起于小指之端，循手外侧上腕，出踝中，直上循臂骨下廉，出肩解，绕肩胛
，交肩上，入缺盆，络心，循咽，下膈，抵胃，属小肠；其支别者，从缺盆循颈，上颊，至
目兑 ，却入耳中；其支者，别颊上 ，抵鼻，至目内 。
足厥阴之脉起于大指丛毛之际，上循足跗上廉，去内踝一寸，上踝八寸，交出太阴之后
，上 内廉，循股阴，入毛中，环阴器，抵小腹，挟胃属肝，络胆，上贯膈，布胁肋，循喉
咙之后，上入颃颡，连目系，上出额，与督脉会于巅；其支从目系下颊里，环唇内；其支复
从肝别贯膈，上注肺。
足少阳之脉起于目兑 ，上抵头角，下耳后，循颈行手少阳之脉前，至肩上，却交出少
阳之后，入缺盆；其支者，从耳中出走耳前，至目兑 后；其支者，自兑 下大迎，合手少
阳，于 ，下交颊车，下颈，合缺盆，下胸中，贯膈，络肝，属胆，循胁里出气街，
绕毛际，横入髀厌中；直者，从缺盆下腋，循胸，过季胁，下合髀厌中，以下循髀太阳，出膝
外廉，下外辅骨之前，直下抵绝骨之端，下出外踝之前，循足跗上，入小指次指之间；其支
者，从跗上入大指，循歧骨内，出其端，还贯入爪甲，出三毛。
足少阴之脉起于小指之下，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，从肾上贯肝膈，入肺中，循喉
咙，挟舌本；其支从肺出，络心，注胸中。
足太阳之脉起于目内 ，上额，交巅上；其支者，从巅至耳上角；其直行者，从巅入络
脑，还出，别下项，循肩膊内，挟脊，抵腰中，入循膂，络肾，属膀胱；其支者，从腰中，
下贯臀，入 中，其支者，从膊内左右别下贯胛，挟脊内，过髀枢，循髀外后廉，下合
中，下贯 内，出外踝之后，循京骨至小指外侧端。
手太阴之脉起于中焦，下络大肠，还循胃口，上膈，属肺，从肺系横出腋下，下循 内
，行少阴心主之前，下肘中，循臂内上骨下廉，入寸口，上鱼，循鱼际出大指之端；其支者
，从腕后直出次指内廉，出其端。
手阳明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，上 外前廉，上肩，出 肩骨之前廉，上出柱骨之会上，下入缺盆，络肺，
下膈，属大肠；其支者，从缺盆上颈，贯颊，下入齿缝中，还出，挟口，交人中，左之右，
右之左，上挟鼻孔。
足太阴之脉起于大指之端，循指内侧白肉际，过核骨后，上内踝前廉，上 内循胫骨后
，交出厥阴之前，上循膝股内前廉，入腹，属脾，络胃，上膈，挟咽，连舌本，散舌下；其
支者，复从胃别上膈，注心中。
足阳明之脉起于鼻，交 中，下循鼻外，入上齿中，还出挟口，环唇，下交承浆，
却循颐后下廉，出大迎，循颊车，上耳前，过客主人，循发际，至额颅；其支者，从大迎前
，下人迎，循喉咙，入缺盆，下膈，属胃，络脾；其直行者，从缺盆下乳内廉，下挟脐，入
气冲中；其支者，起胃下口，循腹裹下，至气冲中而合，以下髀关，抵伏兔下，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，以下入大指间，出其端。
手厥阴之脉起于胸中，出属心包，下膈，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，入肘内，下臂，行两筋之间，入掌中，循中指，出
其端；其支者，从掌中，循小指次指，出其端。
手少阳之脉起于小指次指之端，上出两指之间，循手表腕，出臂外两骨之间，上贯肘，
循外，上肩，交出足少阳之后，入缺盆，交膻中，散络心包，下膈，遍属三焦；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 。
从鱼际穴至高骨（桡骨茎突）之间取一寸，称为寸口；从寸口至尺泽穴，称为尺泽，所以也叫尺中；寸口之后、尺中之前的部位称为关，阳气出于此，阴气入于此，以关作为分界。又说：阴脉占据尺内一寸，阳脉占据寸内九分，从寸口向内六分为关部，从关部再向内六分为尺部，所以三部总共得一寸九分。
心部位于左手寸口，归属于手少阴经，与手太阳小肠经相表里配合。
肝部位于左手关上，归属于足厥阴经，与足少阳胆经相表里配合。
肾部位于左手尺中，归属于足少阴经，与足太阳膀胱经相表里配合。
肺部位于右手寸口，归属于手太阴经，与手阳明大肠经相表里配合。
脾部位于右手关上，归属于足太阴经，与足阳明胃经相表里配合。
右肾位于右手尺中，归属于手厥阴心包经，与手少阳三焦经相表里配合。
手少阴心经的经脉起始于心中，出来归属于心系，向下穿过膈肌，联络小肠；它的支脉，从心系向上挟持咽喉，联系目系；它的主干，又从心系退回向上进入肺，出于腋下，向下沿上臂内侧后缘，行在手太阴肺经和手厥阴心包经之后，下行至肘内侧，沿前臂内侧后缘，到达掌后豌豆骨端，进入掌内前缘，沿小指内侧出其末端。
手太阳小肠经的经脉起始于小指末端，沿手外侧上行至腕部，出踝骨中，直上沿前臂骨下缘，出肩关节，绕肩胛，交会于肩上，进入缺盆，联络心脏，沿咽喉，向下穿过膈肌，到达胃部，归属于小肠；它的分支，从缺盆沿颈部，上至面颊，到达目外眦，却进入耳中；另一支脉，从面颊分出上行至颧骨，到达鼻旁，至目内眦。
足厥阴肝经的经脉起始于大脚趾丛毛处，向上沿足背内侧缘，距内踝前一寸，上行至内踝上八寸处，交出于足太阴脾经之后，上行沿大腿内侧前缘，沿股骨内侧，进入阴毛中，环绕生殖器，到达小腹，挟胃两旁，归属于肝，联络胆，向上穿过膈肌，分布于胁肋，沿喉咙后方，向上进入鼻咽部（颃颡），连接目系，向上出于额部，与督脉会合于头顶；它的分支，从目系下行至面颊内部，环绕嘴唇内侧；另一支脉，再从肝脏分出，贯穿膈肌，向上注入肺中。
足少阳胆经的经脉起始于目外眦，向上到达头角，向下沿耳后，沿颈部行于手少阳三焦经之前，至肩部，却向后交出于足少阳经之后，进入缺盆；它的分支，从耳中出走耳前，至目外眦后方；另一支脉，自目外眦下行至大迎穴，与手少阳三焦经相合，在颊车穴下方，交叉于下颌角，下行颈部，与缺盆汇合，下行至胸中，穿过膈肌，联络肝脏，归属于胆，沿胁肋内部出于气街，环绕阴毛边缘，横向进入髋关节中；直行者，从缺盆下行至腋窝，沿胸部，经过季胁，向下与髋关节中的经脉汇合，以下沿大腿外侧，出膝关节外缘，下行于腓骨前，直下到达腓骨下端，下行出于外踝之前，沿足背，进入第四趾之间；它的分支，从足背进入大脚趾，沿跖骨间隙，出其末端，回穿入指甲，出于趾甲后的丛毛处。
足少阴肾经的经脉起始于小趾之下，斜趋足心，出然谷穴之下，沿内踝后方，别行进入脚跟中，上行于小腿肚，出于内踝上缘，上行沿大腿内侧后缘，穿过脊柱，归属于肾，联络膀胱；它的主干，从肾向上穿过肝和膈肌，进入肺中，沿喉咙，挟持舌根；它的分支，从肺分出，联络心脏，注入胸中。
足太阳膀胱经的经脉起始于目内眦，向上到达额部，交会于头顶；它的分支，从头顶至耳上角；直行者，从头顶进入联络脑部，复出，别行向下项部，沿肩膊内侧，挟脊柱，到达腰部中，进入肌肉深处，联络肾脏，归属于膀胱；它的分支，从腰中，向下贯穿臀部，进入腘窝中；另一分支，从肩膊内侧左右分别向下贯穿肩胛，挟脊柱内侧，经过髋关节，沿大腿外侧后缘，向下与腘窝中的经脉汇合，向下贯穿小腿肚，出于外踝后方，沿京骨穴至小趾外侧端。
手太阴肺经的经脉起始于中焦，向下联络大肠，回转沿胃口，向上穿过膈肌，归属于肺，从肺系横出腋下，向下沿上臂内侧，行在手少阴心经和手厥阴心包经之前，下行至肘中，沿前臂内侧桡骨下缘，进入寸口，上至鱼际，沿鱼际出大脚趾末端；它的分支，从腕后直出食指内侧缘，出其末端。
手阳明大肠经的经脉起始于食指末端，沿食指上缘，出合谷两骨之间，上行入两筋之中，沿前臂上缘，入肘外侧，沿上臂外侧前缘，上肩，出肩峰前缘，向上出于柱骨（第七颈椎）的会上，向下进入缺盆，联络肺，向下穿过膈肌，归属于大肠；它的分支，从缺盆上颈，贯颊，下入齿缝中，回转出来，挟口，交于人中正中，左脉向右，右脉向左，上挟鼻孔。
足太阴脾经的经脉起始于大脚趾末端，沿脚趾内侧白肉际，过核骨后，上行至内踝前缘，上行沿小腿内侧胫骨后缘，交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，挟持咽喉，连接舌根，散布于舌下；它的分支，再从胃部分出，上穿膈肌，注入心中。
足阳明胃经的经脉起始于鼻，交会于鼻根中，向下沿鼻外，入上齿中，回转出来挟口，环绕嘴唇，向下交会于承浆穴，却沿腮后下缘，出大迎穴，沿颊车穴，上至耳前，过客主人穴，沿发际，至额颅；它的分支，从大迎前，下行人迎穴，沿喉咙，入缺盆，向下穿过膈肌，归属于胃，联络脾；它的直行者，从缺盆下沿乳内缘，向下挟脐，进入气冲中；它的分支，起于胃下口，沿腹内下行，至气冲中而汇合，以下沿大腿前侧，抵伏兔下，入膝盖髌骨中；向下沿小腿外侧前缘，下至足背，入中指内间；它的分支，下膝三寸处分出，以下进入大脚趾间，出其末端。
手厥阴心包经的经脉起始于胸中，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，沿胸部，出胁部，下腋三寸，向上抵腋下，向下沿上臂内侧，行在手太阴肺经和手少阴心经之间，入肘内，下臂，行于两筋之间，入掌中，沿中指，出其末端；它的分支，从掌中，沿无名指，出其末端。
手少阳三焦经的经脉起始于无名指末端，向上出两指之间，沿手腕背面，出前臂外侧两骨之间，上贯肘，沿上臂外侧，上肩，交出于足少阳胆经之后，进入缺盆，交于膻中，散布联络心包，向下穿过膈肌，遍属上、中、下三焦；它的分支，从膻中上行，出缺盆，上项，挟耳后，直上出于耳上角，以屈折下行至面颊，至眼眶下；它的分支，从耳后入耳中，却出，至目外眦。
From the radial styloid process (Gaogu) to the fish margin (Yuji), a distance of one cun is measured, named Cun Kou (Inch Port); from Cun Kou to Chi Ze (尺泽), it is named Chi Ze, thus also referred to as Chi Zhong (尺中). The area between Cun Kou and Chi Zhong is named Guan (关). Yang Qi emerges here, Yin Qi enters here, with Guan serving as the boundary. It is further stated: Yin occupies one cun within Chi, while Yang occupies nine fen within Cun. Moving six fen inward from Cun Kou defines the Guan section; moving another six fen inward from Guan defines the Chi section. Thus, the three sections together measure one cun and nine fen.
The Heart region is located at Cun Kou on the left hand, belonging to the Hand-Shaoyin (Heart) Meridian, which pairs with the Hand-Taiyang (Small Intestine) Meridian.
The Liver region is located at Guan on the left hand, belonging to the Foot-Jueyin (Liver) Meridian, which pairs with the Foot-Shaoyang (Gallbladder) Meridian.
The Kidney region is located at Chi on the left hand, belonging to the Foot-Shaoyin (Kidney) Meridian, which pairs with the Foot-Taiyang (Bladder) Meridian.
The Lung region is located at Cun Kou on the right hand, belonging to the Hand-Taiyin (Lung) Meridian, which pairs with the Hand-Yangming (Large Intestine) Meridian.
the Spleen region is located at Guan on the right hand, belonging to the Foot-Taiyin (Spleen) Meridian, which pairs with the Foot-Yangming (Stomach) Meridian.
The Right Kidney is located at Chi on the right hand, belonging to the Hand-Jueyin (Pericardium) Meridian, which pairs with the Hand-Shaoyang (Sanjiao/Triple Burner) Meridian.
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 ascends from the Heart System along the pharynx and connects with the Eye System; its main trunk returns from the Heart System, enters the lungs, emerges from the axilla, descends along the posterior medial aspect of the upper arm, running posterior to the Hand-Taiyin and Hand-Jueyin meridians, reaches the medial elbow, follows the medial forearm, arrives at the end of the pisiform bone behind the palm, enters the medial palm, and emerges at the tip of the little finger.
The Hand-Taiyang Small Intestine Meridian originates at the tip of the little finger, ascends along the lateral side of the hand to the wrist, emerges from the malleolus, goes straight up along the lower border of the forearm bone, emerges from the shoulder joint, winds around the scapula, intersects at the shoulders, enters the supraclavicular fossa (Quepen), connects with the heart, follows the pharynx, descends through the diaphragm, reaches the stomach, and belongs to the Small Intestine; its branch emerges from the supraclavicular fossa, follows the neck, ascends to the cheek, reaches the outer canthus of the eye, then enters the ear; another branch diverges from the cheek, ascends to the zygomatic arch, reaches the nose, and arrives at the inner canthus of the eye.
The Foot-Jueyin Liver Meridian originates at the hair tuft of the big toe, ascends along the medial border of the dorsum of the foot, one cun anterior to the medial malleolus, ascends eight cun above the medial malleolus, crosses posterior to the Foot-Taiyin meridian, ascends along the medial thigh, enters the pubic region, circles the external genitalia, reaches the lower abdomen, flanks the stomach, belongs to the liver, connects with the gallbladder, ascends through the diaphragm, distributes in the hypochondrium, follows the posterior aspect of the throat, ascends into the nasopharynx (Hangsang), connects with the Eye System, emerges above the forehead, and meets the Du Meridian at the vertex; its branch descends from the Eye System to the interior of the cheek, circles the inside of the lips; another branch diverges from the liver, pierces the diaphragm, and ascends to pour into the lungs.
The Foot-Shaoyang Gallbladder Meridian originates at the outer canthus of the eye, ascends to the temporal angle, descends behind the ear, follows the neck anterior to the Hand-Shaoyang Sanjiao Meridian, reaches the shoulder, crosses posterior to the Foot-Shaoyang Meridian, and enters the supraclavicular fossa; its branch emerges from the ear, travels anterior to the ear, and reaches the posterior aspect of the outer canthus; another branch descends from the outer canthus to Daying, merges with the Hand-Shaoyang Meridian below Jiache, descends the neck, merges with the supraclavicular fossa, descends into the chest, pierces the diaphragm, connects with the liver, belongs to the gallbladder, follows the interior of the hypochondrium, emerges at Qichong, circles the pubic region, and transversely enters the hip joint; the direct path descends from the supraclavicular fossa to the axilla, follows the chest, passes the lateral costal margin, merges with the path in the hip joint, descends along the lateral thigh, emerges at the lateral knee, runs anterior to the fibula, reaches the end of the fibular head, emerges anterior to the lateral malleolus, follows the dorsum of the foot, and enters the space between the fourth and fifth toes; its branch enters the big toe from the dorsum, follows the interosseous space, emerges at the tip, re-enters the nail bed, and emerges at the hair tuft.
The Foot-Shaoyin Kidney Meridian originates below the little toe,斜趋 (diagonally approaches) the center of the sole, emerges below Rangu, follows the posterior aspect of the medial malleolus, diverges into the heel, ascends the calf, emerges at the medial malleolus, ascends along the posterior medial thigh, pierces the spine, belongs to the kidney, connects with the bladder; its main trunk ascends from the kidney, pierces the liver and diaphragm, enters the lungs, follows the throat, flanks the root of the tongue; its branch emerges from the lungs, connects with the heart, and pours into the chest.
The Foot-Taiyang Bladder Meridian originates at the inner canthus of the eye, ascends to the forehead, and intersects at the vertex; its branch extends from the vertex to the superior angle of the ear; the direct path enters from the vertex to connect with the brain, emerges again, diverges downward to the nape, follows the medial scapula, flanks the spine, reaches the waist, enters the deep muscles, connects with the kidney, and belongs to the bladder; its branch descends from the waist, penetrates the buttocks, and enters the popliteal fossa; another branch diverges from the medial scapula on both sides, penetrates the scapula, flanks the spine internally, passes the hip pivot, follows the posterior lateral thigh, merges with the path in the popliteal fossa, descends through the calf, emerges posterior to the lateral malleolus, follows Jinggu to the lateral end of the little toe.
The Hand-Taiyin Lung Meridian originates in the Middle Jiao, descends to connect with the Large Intestine, returns to follow the stomach opening, ascends through the diaphragm, belongs to the lung, emerges horizontally from the Lung System to the axilla, descends along the medial upper arm, running anterior to the Hand-Shaoyin and Hand-Jueyin meridians, descends to the elbow, follows the medial forearm along the lower border of the radius, enters Cun Kou, ascends to Yuji, follows the Thenar Eminence, and emerges at the tip of the thumb; its branch emerges directly from the posterior wrist to the medial aspect of the index finger, exiting at 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 two bones at Hegu, ascends between the two tendons, follows the radial border of the forearm, enters the lateral elbow, ascends along the anterior lateral border of the upper arm, reaches the shoulder, emerges anterior to the acromion, ascends to meet the vertebral column, descends into the supraclavicular fossa, connects with the lung, descends through the diaphragm, and belongs to the Large Intestine; its branch ascends from the supraclavicular fossa to the neck, penetrates the cheek, descends into the dental gap, returns, flanks the mouth, intersects at Renzhong, crossing from left to right and right to left, ascending to flank the nostrils.
The Foot-Taiyin Spleen Meridian originates at the tip of the big toe, follows the medial white flesh border, passes posterior to the first metatarsal head, ascends anterior to the medial malleolus, ascends along the posterior tibia, crosses anterior to the Foot-Jueyin meridian, ascends along the anterior medial knee and thigh, enters the abdomen, belongs to the spleen, connects with the stomach, ascends through the diaphragm, flanks the pharynx, connects with the root of the tongue, and disperses under the tongue; its branch diverges from the stomach, ascends through the diaphragm, and pours into the heart.
The Foot-Yangming Stomach Meridian originates at the nose, intersects at the nasal root, descends along the lateral nose, enters the upper teeth, returns to flank the mouth, circles the lips, descends to intersect at Chengjiang, follows the posterior mandible, emerges at Daying, follows Jiache, ascends anterior to the ear, passes Guanzhuren, follows the hairline, and reaches the frontal skull; its branch descends from anterior to Daying to Renying, follows the throat, enters the supraclavicular fossa, descends through the diaphragm, belongs to the stomach, and connects with the spleen; its direct path descends from the supraclavicular fossa along the medial breast, descends flanking the umbilicus, and enters Qichong; its branch originates from the lower opening of the stomach, descends along the abdominal wall, merges at Qichong, descends along the thigh anteriorly, reaches below Futu, enters the patella; descends along the lateral leg, reaches the dorsum of the foot, and enters the space between the middle toes; its branch diverges three cun below the knee, enters the space between the big toes, and emerges at the tip.
The Hand-Jueyin Pericardium Meridian originates in the chest, emerges to belong to the Pericardium, descends through the diaphragm, and sequentially connects with the Upper, Middle, and Lower Jiao; its branch follows the chest, emerges from the hypochondrium, descends three cun below the axilla, ascends to the axilla, descends along the medial upper arm, running between the Hand-Taiyin and Hand-Shaoyin meridians, enters the elbow, descends the forearm, runs between the two tendons, enters the palm, follows the middle finger, and emerges at its tip; its branch emerges from the palm, follows the ring finger, and emerges at its tip.
The Hand-Shaoyang Sanjiao Meridian originates at the tip of the ring finger, emerges between the two fingers, follows the dorsal wrist, emerges between the two bones of the forearm, ascends through the elbow, follows the lateral upper arm, ascends to the shoulder, crosses posterior to the Foot-Shaoyang Meridian, enters the supraclavicular fossa, intersects at Tanzhong, disperses and connects with the Pericardium, descends through the diaphragm, and pervasively belongs to the Upper, Middle, and Lower Jiao; its branch ascends from Tanzhong, emerges from the supraclavicular fossa, ascends the neck, flanks the posterior ear, ascends directly to the superior angle of the ear, curves down to the cheek, and reaches the infraorbital region; its branch enters the ear from the posterior ear, emerges again, and reaches the outer canthus.