六节脏象论云∶心为阳中之太阳，肺为阳中之太阴，肾为阴中之少阴，肝为阳中之少阳
。而
《灵枢》九针十二原云∶阳中之少阴肺也，阳中之太阳心也，阴中之少阳肝也，阴中之太阴
肾也。按《素》以肝为阳者，言其时；《灵》以肝为阴者，言其脏也。《素》以肺为太阴，
肾为少阴者，举其经之名；《灵》以肺为少阴，肾为太阴者，以肺为阴脏而居阳位，肾为阴
脏而居阴位也。二经之不同如此。
经脉十二，络脉十五，凡二十七气以上下。所出为井，所溜为荥，所注为 ，所过为
原，所行
为经，所入为合。故本输篇云∶膀胱出于至阴，为井；溜于通谷，为荥；注于束骨，为 ；
过于京骨，为原；行于昆仑，为经；入于委中，为合。胆出于窍阴，为井；溜于侠溪，注于
临泣，为 ；过于丘墟，为原；行于阳辅，为经；入于阳之陵泉，为合。胃出于厉兑，为井
；溜于内庭，为荥；注于陷谷，为 ；过于冲阳，为原；行于解溪，为经；入于下陵为合。
而《根结篇》云∶足太阳根起于至阴，溜于京骨，注于昆仑，入于天柱、飞扬。足少阳根起
于窍阴，溜于丘墟，注于阳辅，入于天容。足阳明根起于厉兑，溜于冲阳，注于下陵，入于
人迎、丰隆。是以井、荥、 、原、经、合之处，即一经所言，而亦有不同如此。
《素问·六节脏象论》中说：心是阳中之太阳，肺是阳中之太阴，肾是阴中之少阴，肝是阳中之少阳。而《灵枢·九针十二原》中说：阳中之少阴是肺，阳中之太阳是心，阴中之少阳是肝，阴中之太阴是肾。考察《素问》将肝归为阳，是从时令角度而言；《灵枢》将肝归为阴，是从脏腑属性而言。《素问》称肺为太阴、肾为少阴，是列举经脉的名称；《灵枢》称肺为少阴、肾为太阴，是因为肺作为阴脏却居于阳位，肾作为阴脏却居于阴位。两部经典的不同之处正是如此。
人体有十二条经脉和十五条络脉，共计二十七气上下运行。气血流注的起点称为井穴，刚流过之处称为荥穴，灌注之处称为输穴（此处原文缺字，通常指“注”），经过之处称为原穴，运行之处称为经穴，深入汇聚之处称为合穴。因此《灵枢·本输》篇中说：膀胱经的气出于至阴穴，这是井穴；流经通谷穴，这是荥穴；灌注于束骨穴，这是输穴；经过京骨穴，这是原穴；行于昆仑穴，这是经穴；入于委中穴，这是合穴。胆经的气出于窍阴穴，这是井穴；流经侠溪穴，灌注于临泣穴，这是输穴；经过丘墟穴，这是原穴；行于阳辅穴，这是经穴；入于阳陵泉穴，这是合穴。胃经的气出于厉兑穴，这是井穴；流经内庭穴，灌注于陷谷穴，这是输穴；经过冲阳穴，这是原穴；行于解溪穴，这是经穴；入于足三里（下陵）穴，这是合穴。然而《灵枢·根结》篇中说：足太阳膀胱经的根起于至阴穴，溜于京骨穴，注于昆仑穴，入于天柱穴和飞扬穴。足少阳胆经的根起于窍阴穴，溜于丘墟穴，注于阳辅穴，入于天容穴。足阳明胃经的根起于厉兑穴，溜于冲阳穴，注于足三里（下陵）穴，入于人迎穴和丰隆穴。由此可见，关于井、荥、输、原、经、合各穴的位置，在一部经典中的说法与另一部经典中有所不同，情况正是如此。
The *Suwen* (Plain Questions), chapter "Six Jie Zangxiang Lun" (Treatise on the Six Jie and Viscera Manifestations) states: The Heart is the Taiyang (Greater Yang) within the Yang; the Lung is the Taiyin (Greater Yin) within the Yang; the Kidney is the Shaoyin (Lesser Yin) within the Yin; the Liver is the Shaoyang (Lesser Yang) within the Yang. However, the *Lingshu* (Spiritual Pivot), chapter "Jiuzhen Shieryuan" (Nine Needles and Twelve Source Points) states: The Shaoyin (Lesser Yin) within the Yang is the Lung; the Taiyang (Greater Yang) within the Yang is the Heart; the Shaoyang (Lesser Yang) within the Yin is the Liver; the Taiyin (Greater Yin) within the Yin is the Kidney. Examining this, the *Suwen* classifies the Liver as Yang based on its corresponding season/time; the *Lingshu* classifies the Liver as Yin based on its visceral nature. The *Suwen* refers to the Lung as Taiyin and the Kidney as Shaoyin by citing their meridian names; the *Lingshu* refers to the Lung as Shaoyin and the Kidney as Taiyin because the Lung, although a Yin organ, resides in a Yang position (upper jiao/chest), and the Kidney, although a Yin organ, resides in a Yin position (lower jiao/abdomen). Such is the difference between these two classics.
There are twelve primary meridians (Jingmai) and fifteen collaterals (Luomai), totaling twenty-seven Qi pathways that circulate up and down. The points where Qi emerges are called Jing-Well (Jing) points; where it flows lightly are Ying-Spring (Ying) points; where it pours is the Shu-Stream (Shu) point [text missing in original, usually implies Shu]; where it passes is the Yuan-Source (Yuan) point; where it travels is the Jing-River (Jing) point; and where it enters deeply is the He-Sea (He) point. Therefore, the *Benshu* (Roots and Transmissions) chapter of the *Lingshu* states: The Bladder meridian emerges at Zhiyin (BL-66), which is the Jing-Well point; flows through Tonggu (BL-65), which is the Ying-Spring point; pours into Shugu (BL-64), which is the Shu-Stream point; passes through Jinggu (BL-64 is often cited as Shu/Yuan overlap or BL-64/Shugu context depending on text version, here strictly following text: Jinggu is Yuan), which is the Yuan-Source point; travels through Kunlun (BL-60), which is the Jing-River point; and enters Weizhong (BL-40), which is the He-Sea point. The Gallbladder meridian emerges at Qiaoyin (GB-44), which is the Jing-Well point; flows through Xiaxi (GB-43); pours into Linqi (GB-41), which is the Shu-Stream point; passes through Qiuxu (GB-40), which is the Yuan-Source point; travels through Yangfu (GB-38), which is the Jing-River point; and enters Yanglingquan (GB-34), which is the He-Sea point. The Stomach meridian emerges at Lidui (ST-45), which is the Jing-Well point; flows through Neiting (ST-44), which is the Ying-Spring point; pours into Xangu (ST-43), which is the Shu-Stream point; passes through Chongyang (ST-42), which is the Yuan-Source point; travels through Jiexi (ST-41), which is the Jing-River point; and enters Xialing (Zusanli, ST-36), which is the He-Sea point. However, the *Genjie* (Roots and Knots) chapter of the *Lingshu* states: The root of the Foot-Taiyang Bladder meridian begins at Zhiyin, flows to Jinggu, pours into Kunlun, and enters Tianzhu (BL-10) and Feiyang (BL-58). The root of the Foot-Shaoyang Gallbladder meridian begins at Qiaoyin, flows to Qiuxu, pours into Yangfu, and enters Tianrong (SI-17). The root of the Foot-Yangming Stomach meridian begins at Lidui, flows to Chongyang, pours to Xialing (Zusanli), and enters Renying (ST-9) and Fenglong (ST-40). Thus, regarding the locations of the Jing-Well, Ying-Spring, Shu-Stream, Yuan-Source, Jing-River, and He-Sea points, the descriptions differ between the two texts in this manner.