督脉者。起于下极之 。并于脊里。上至风府。入属于脑。
任脉者。起于中极之下。以上毛际。循腹里。上关元。至咽喉上颐。循面入目。络舌。
冲脉者。起于气街。并足阳明之经。挟脐上行。至胸中而散。
带脉者。起于季胁。回身一周。
阳跷脉者。起于跟中。循外踝上行。入风池。
阴跷脉者。起于跟中。循内踝上行。至咽喉。交贯冲脉。
阳维起于诸阳之会。
阴维起于诸阴之交。
皇极经云。人之四肢。各有脉也。一脉三部。一部三候。以应天数也。一脉三部。寸关
尺也
一部三候。浮中沉也。所以应之九数也。愚谓脉之理亦微矣。人有四时之正脉。有平生之
常脉。有内伤之变脉。有外感之邪脉。有重阴之脉。有重阳之脉。有阳虚而阴乘之脉。有阴
虚而阳乘之脉。有阳极而阴生之脉。有阴极而阳生之脉。有独见之脉。有兼见之脉。有初病
之脉。有久病之脉。有可治之脉。有不治之脉。其左右上下表里之间。有余不足。惟在乎分
别阴阳。能分别阴阳。斯可以识脉之体。刘复真曰。昔王叔和以七表八里脉。决人之生死。
然又文理浩繁。今撮其枢要。以浮沉迟数四脉为宗。知风气冷热主病。且浮而有力者为风。
浮而无力为虚。沉而有力为积。沉而无力为气。迟而有力为痛。迟而无力为冷。数而有力为
热。数而无力为疮。更分三部。在何部得之。若在寸部。主上焦头面胸膈之疾。关部。主中
焦肚腹脾胃之疾。尺部。主下焦小腹腰足之疾。诊其五脏。何脏得之。六腑亦然。学人又当
以意会而加精别。庶不致按寸握尺之诮云。
督脉，起始于会阴部，沿着脊柱内部上行，到达风府穴，进入并归属于脑。
任脉，起始于中极穴下方，向上经过阴毛边缘，沿着腹部内侧上行，经过关元穴，到达咽喉，再向上至下颌，沿面部进入目内眦，联络舌根。
冲脉，起始于气街穴，与足阳明胃经并行，挟持肚脐两侧上行，到达胸部后散开。
带脉，起始于季胁（侧肋下部），环绕身体一周。
阳跷脉，起始于足跟中部，沿外踝向上行，进入风池穴。
阴跷脉，起始于足跟中部，沿内踝向上行，到达咽喉，与冲脉交叉贯通。
阳维脉，起始于诸阳经交会之处。
阴维脉，起始于诸阴经交会之处。
《皇极经世》说：人的四肢，各有经脉。每条经脉分为三部，每部有三候，以对应天数。所谓一脉三部，是指寸、关、尺三部；所谓一部三候，是指浮、中、沉三种指力。以此对应九数。我认为脉理也是深微的。人有顺应四时的正常脉象，有平生一贯的常态脉象，有内伤引起的变异性脉象，有外感邪气引起的病理性脉象，有重阴之脉，有重阳之脉，有阳虚而阴气乘袭之脉，有阴虚而阳气乘袭之脉，有阳极而生阴之脉，有阴极而生阳之脉，有单独出现的脉象，有兼夹出现的脉象，有初发病时的脉象，有久病后的脉象，有可治愈的脉象，有不可治愈的脉象。在左右、上下、表里之间，有余或不足的情况，关键在于分辨阴阳。能够分辨阴阳，就可以认识脉的本质。刘复真说：过去王叔和用七表八里脉法来判断人的生死，然而其文理浩繁复杂。现在摘录其关键要点，以浮、沉、迟、数四种脉象为根本。知晓风、气、冷、热所主疾病：浮脉有力者为风邪，浮脉无力者为虚证；沉脉有力者为积滞，沉脉无力者为气滞；迟脉有力者为疼痛，迟脉无力者为寒冷；数脉有力者为热证，数脉无力者为疮疡。再进一步区分三部，看在哪一部出现此脉。如果在寸部，主要主上焦头面胸膈的疾病；关部，主要主中焦肚腹脾胃的疾病；尺部，主要主下焦小腹腰足的疾病。诊察五脏，是哪一脏出现此脉？六腑也是如此。学习者应当用心领会并加以精细辨别，以免遭受“按寸握尺”（只知机械操作而不解医理）的讥讽。
The Du Mai (Conception Vessel of the Back) originates at the perineum, runs along the interior of the spine, ascends to the Fengfu point (GV16), and enters to connect with the brain.
The Ren Mai (Conception Vessel) originates below the Zhongji point (CV3), ascends above the pubic hairline, follows the interior of the abdomen, passes through the Guanyuan point (CV4), reaches the throat, ascends to the chin, follows the face into the eyes, and connects with the tongue.
The Chong Mai (Penetrating Vessel) originates at the Qichong point (ST30), runs parallel to the Foot-Yangming Stomach Meridian, flanks the umbilicus ascending upward, and disperses in the chest.
The Dai Mai (Girdle Vessel) originates at the hypochondrium, encircles the body once.
The Yang Qiao Mai (Yang Heel Vessel) originates in the middle of the heel, follows the lateral malleolus upward, and enters the Fengchi point (GB20).
The Yin Qiao Mai (Yin Heel Vessel) originates in the middle of the heel, follows the medial malleolus upward, reaches the throat, and intersects with the Chong Mai.
The Yang Wei Mai (Yang Linking Vessel) originates at the convergence of all Yang meridians.
The Yin Wei Mai (Yin Linking Vessel) originates at the intersection of all Yin meridians.
The Huangji Jingshi states: The four limbs of humans each have their own pulses. Each pulse is divided into three positions, and each position has three depths, corresponding to the numbers of Heaven. "One pulse, three positions" refers to Cun (Inch), Guan (Bar), and Chi (Cubit). "One position, three depths" refers to Floating (Fu), Middle (Zhong), and Sinking (Chen). This corresponds to the number nine. I believe the principle of pulse diagnosis is also subtle. Humans have normal pulses conforming to the four seasons, constant pulses characteristic of one's lifetime, altered pulses due to internal injury, pathological pulses due to external pathogens, pulses of heavy Yin, pulses of heavy Yang, pulses where Yin overcomes due to Yang deficiency, pulses where Yang overcomes due to Yin deficiency, pulses where Yin arises from extreme Yang, pulses where Yang arises from extreme Yin, solitary appearing pulses, combined appearing pulses, pulses at the onset of disease, pulses after prolonged illness, curable pulses, and incurable pulses. Between left and right, upper and lower, exterior and interior, whether there is excess or deficiency depends on distinguishing Yin and Yang. If one can distinguish Yin and Yang, then one can understand the essence of the pulse. Liu Fuzhen said: In the past, Wang Shuhe used the Seven Tables and Eight Mansions pulse methods to determine life and death, but the textual principles were vast and complex. Now, extracting its key points, we take the Floating, Sinking, Slow, and Rapid pulses as the foundation. Knowing the diseases governed by Wind, Qi, Cold, and Heat: A Floating pulse with strength indicates Wind; a Floating pulse without strength indicates Deficiency. A Sinking pulse with strength indicates Accumulation; a Sinking pulse without strength indicates Qi stagnation. A Slow pulse with strength indicates Pain; a Slow pulse without strength indicates Cold. A Rapid pulse with strength indicates Heat; a Rapid pulse without strength indicates Sores/Ulcers. Furthermore, distinguish the three positions: if found in the Cun position, it governs diseases of the Upper Jiao (Head, Face, Chest, Diaphragm); the Guan position governs diseases of the Middle Jiao (Abdomen, Spleen, Stomach); the Chi position governs diseases of the Lower Jiao (Lower Abdomen, Waist, Feet). When diagnosing the Five Zang organs, which organ presents this pulse? The same applies to the Six Fu organs. Students should comprehend this through intent and add precise discrimination, so as not to suffer the ridicule of merely "holding the inch and cubit" without understanding the underlying principles.