I feel, now that we know that we are not the body but the consciousness within, in that case, it does not matter to know about the body and its birth, grows decays...
We are not different from the body. The Brahman pervades everywhere. Don't "See" Body, just be as consciousness. In this case Body is also a thought only, here the Ego is expressing itself as the body, the best course is to abide as Self or consciousness witness.
In Cardiac operations, Doctors stop the heart beats and perform the operation and then they make the heart beat, then what is there in body? why does he not die? He comes back to life again.
Its the tendency of Ego-Mind to move away from Consciousness. It wants change, hence questions keep coming up.
Its like this, imagine, you are sitting as one among 100 odd members in a very boring lecture, and you want so badly to get up leave the hall, but our dignity will not allow to leave the room abruptly. Its like this, the situation of our ego forcing itself to sit as consciousness. But with due diligence and patience, with understanding, when we really pay attention to the Lecture and involve ourselves by listening with real interest, then the Ego is no more active, its lost. The Conscciousness prevails.
Body is only a thought manifestation of our Ego.
Ramana Maharshi has said - "to think is not your real nature" also he has said - "give your body to nature and yourself to me"
Sri Ramana