Verse 37

सर्वेषामेव जन्तूनां संविद्धृदयमुच्यते ।न देहावयवैकांशो जडजीर्णोपलोपमः

In plain words

Of all creatures, without exception, it is saṃvid that is called the heart -- not some single portion of a bodily limb, comparable to a dull, decaying stone.