। ॥ ५४० ॥
In plain words
That the senses in this body are themselves conscious is established by śruti itself: the prāṇas went to Prajāpati, stood before him, and spoke.
Close to the Sanskrit
The sentience of the sense organs in the body — 'the prāṇas, having approached this Prajāpati, spoke thus' — is established by śruti itself.