How many cells are there in the human body?

Since no one has actually counted them, the only answers that can be given are estimates. But, as a rough guide, it is estimated that the body contains

10 000 000 000 000

(or 10 trillion) cells. Other estimates put the figure at around 50 trillion though.

What is even weirder is that the human body has around ten times as many bacteria as this associated with it (on and inside it). These bacteria are called the normal flora, and most live in the large intestine.

We are almost literally a cloud of bacteria, with a few human bits thrown in...