What is interesting knowledge about human biology?

I am gonna share some facts I know:

Your brain does not feel pain as it has no pain receptors.

The heart can keep beating even after being removed from the rest of the body due to its electrical impulse, so long as it receives oxygen.

There are 10 times more bacteria cells in your body than your own. For reference, an adult human body has around 10 trillion cells.

Your brain can store 2.5 million gigabytes of data and process info much faster than the fastest supercomputer.

Your nose can recognize 50,000 different scents.

Only 2% of Humans Have Green Eyes.

Eyes Remain Almost the Same Size Your Entire Life.

Every Second, You Produce 25 million Cells.

Inside the human body, you can find 60,000 miles of blood vessels. That’s the equivalent of going around the world over two times — which is a mind-boggling distance.

There’s a specific type of tumor, called a teratoma, that often contains hair and bones, including teeth. Yes, these tumors are rare, though they can occur in people of all ages and can be either cancerous or noncancerous.