The average adult male human is comprised of 36 trillion cells (36,000,000,000,000) across 400 species. Females have around 27 trillion. And there is a constant reshuffling: some cells are replaced every few months, others last for life. Remarkable that something that complex could be held together in one bag of skin and bone.
Let's set aside the doom and gloom for just a bit and indulge in a bit of colourful history courtesy of Banjo Patterson. On the outer Barcoo where the churches are few, And men of religion are scanty, On a road never cross'd 'cept by folk that are lost, One Michael Magee had a shanty. Now this Mike was the dad of a ten-year-old lad, Plump, healthy, and stoutly conditioned; He was strong as the best, but poor Mike had no rest For the youngster had never been christened, And his…