My body, your body, let us study what is this body. This body is produced or generated from the small spiritual spark. That is also mentioned in the śāstra, what is the dimension of that small spiritual spark:
keśāgra-śata-bhāgasya śatadhā kalpitasya ca jīva-bhāgaḥ sa vijñeyaḥ sa cānantyāya kalpate (Śvetāśvatara Upaniṣad 5.9) Keśāgra-śata-bhāgasya. The upper portion, the tip of the hair, just like a point, you divide into hundred parts and take another one part and divide another hundred parts. That means one ten-thousandth part of the tip of the hair is the dimension of the spirit soul. That spirit soul, on the basis of that spirit soul, this body develops. Any medical scientist knows.
And we know from the Vedic literatures that this small particle, atomic particle of spiritual spark, takes shelter in the semina of the father, and the father injects the semina in the womb of the mother. Then, if the situation is favorable, then it takes a form of body just like a pea in the first night. That pealike body develops. Then different holes are manifested. They are developed into eyes, ears, mouth and so many holes, nine holes in the body.
So anyone can understand that that small particle of atomic portion of a spiritual spark develops this body, big body. Not only human body; all sorts of bodies. Similarly, this whole universe is also a development of the spiritual body of Kṛṣṇa, Paramātmā. So it is not very difficult to understand. The Buddhist theory is that living symptoms are produced by combination of matter.