Vaishnava Dharmashastra 96.91

96.91

vasā vapā avahananaṃ nābhiḥ klomā yakṛt plīhā kṣudrāntraṃ vṛkkakau bastiḥ purīṣādhānaṃ āmāśayaḥ hṛdayaṃ sthūlāntraṃ gudam udaraṃ gudakoṣṭham ||

Adeps, marrow, the left lung, the navel, the right lung, the liver, the spleen, the small cavity of the heart, the kidneys, the bladder, the rectum, the stomach, the heart, the large cavity (intestine), the anus, the belly, and the two bowels in it (are the inner parts of the body).