条文：
经云：心者君主之官，神明出焉。
又云：心居肺管之下，膈膜之上，附着脊之第五椎，其合脉也，其荣色也，
开窍于耳，又曰开窍于舌。
又云：是经少血多气。
『难经』曰：心重十二两，中有七乳三毛，盛精汁三合，主藏神。
张介宾曰：心象尖圆，形如莲蕊，其中有窍，多寡不同，以导引天真之气，
下无透窍，上通乎舌，共有四系，以通四脏，心外有赤黄脂裹，是为心包络，
心下有膈膜，与脊胁周回相看，遮蔽浊气，使不得上熏心肺，所谓膻中也。
（图五○）
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条文：
心手少阴之脉，起于心中，出属心系，下膈络小肠；其支者，从心系上侠咽，
系目系；其直者，复从心系却上肺，下出腋下，循臑内后廉，
行手太阴肺心主之后，下肘内，循臂内后廉，抵掌后锐骨之端，入掌内后廉，
循小指之内出其端（图五十一）。
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条文：
手少阴脉起心中，下膈直与小肠通，支者还从肺系走，直上喉咙系目瞳，
直者上肺出腋下，臑后肘内少海从，臂内后廉抵掌中，锐骨之端注少冲。
注：[1]手少阴心经之脉，起于心中，出属心系，由心系下膈，络小肠；
其经之支者，从心系上行夹咽，系目之系；其经之直者，
复从心系退上通肺，行手太阴肺心主之后，下出行腋下，极泉穴也。
[2]从极泉穴循臑内后廉，青灵穴也。
[3]从青灵穴下肘内循臂内后廉，少海穴也。
[4]从少海穴抵掌后锐骨之端，灵道、通里、阴□、神门等穴也。
[5]从神门穴入掌内后廉，少府穴也。
[6]从少府穴循小指之内，出其端，少冲穴而终，
以交于手太阳小肠经也。
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The classic states: The Heart is the sovereign official, from which Shen (Spirit/Mind) emerges.
It further states: The Heart is located below the pulmonary tube and above the diaphragm, attached to the fifth thoracic vertebra of the spine. Its function connects with the vessels, its luster manifests in the complexion,
and it opens into the ears; it is also said to open into the tongue.
It further states: This meridian (Hand-Shaoyin Heart Meridian) has less blood and more Qi.
The *Nan Jing* (Classic of Difficult Issues) states: The Heart weighs twelve liang, contains seven mammary-like structures and three hairs, holds three he of essence fluid, and primarily functions to store Shen (Spirit).
Zhang Jiebin stated: The Heart is pointed and round in shape, resembling a lotus stamen. It possesses orifices within, varying in number, which guide the Tianzhen (True/Innate) Qi.
There are no perforating orifices at the bottom, but it connects upward to the tongue. There are four ties in total, connecting to the other four Zang organs. Outside the Heart, there is red-yellow fat wrapping it, which is called the Xinbao Luo (Pericardium).
Below the Heart lies the diaphragm, surrounding the spine and hypochondrium, shielding turbid Qi so that it cannot ascend to fumigate the Heart and Lungs. This is what is referred to as Danzhong (Chest Center).
(Figure 50)
Article:
The Hand-Shaoyin Heart Meridian originates in the Heart, emerges to belong to the Heart system, descends through the diaphragm, and connects with the Small Intestine; its branch ascends from the Heart system along both sides of the pharynx,
connecting to the Eye System; its main trunk returns from the Heart system, ascends into the Lung, descends out of the axilla, follows the posterior medial border of the upper arm,
running posterior to the Hand-Taiyin Lung Meridian and Hand-Jueyin Pericardium Meridian, descends into the elbow, follows the posterior medial border of the forearm, reaches the end of the styloid process of the ulna (sharp bone) at the wrist, enters the posterior medial aspect of the palm,
and emerges from the tip of the little finger (Figure 51).
Article:
The Hand-Shaoyin Meridian originates in the Heart, descends through the diaphragm directly connecting with the Small Intestine; the branch returns from the Lung system, ascending straight to the throat and connecting to the pupil;
the main trunk ascends into the Lung, exits the axilla, passes through Shaohai (HT3) in the posterior elbow region, follows the posterior medial forearm to the palm, and injects into Shaochong (HT9) at the end of the sharp bone.
Note: [1] The Hand-Shaoyin Heart Meridian originates in the Heart, emerges to belong to the Heart system, descends from the Heart system through the diaphragm, and connects with the Small Intestine;
its branch ascends from the Heart system along both sides of the pharynx, connecting to the Eye System; its main trunk
returns from the Heart system, ascends to connect with the Lung, runs posterior to the Hand-Taiyin Lung Meridian and Hand-Jueyin Pericardium Meridian, descends out of the axilla, which is Ji Quan (HT1).
[2] From Ji Quan (HT1), following the posterior medial border of the upper arm, is Qing Ling (HT8).
[3] From Qing Ling (HT8), descending into the elbow and following the posterior medial border of the forearm, is Shaohai (HT3).
[4] From Shaohai (HT3), reaching the end of the sharp bone at the wrist, are Ling Dao (HT4), Tong Li (HT5), Yin Xi (HT6), Shen Men (HT7), etc.
[5] From Shen Men (HT7), entering the posterior medial aspect of the palm, is Shao Fu (HT8).
[6] From Shao Fu (HT8), following the medial side of the little finger and emerging from its tip, is Shao Chong (HT9), where it terminates,
thereby connecting with the Hand-Taiyang Small Intestine Meridian.