Is there a lot of things that we don’t know about the human body or do we know almost everything about it?

Question: Is there a lot of things that we don't know about the human body or do we know almost everything about it?
- Keywords:
  human body,
  know
Asked by anon-170057 to Ben, Francis, Max on 15 Mar 2018.
- Francis Man answered on 15 Mar 2018:
  
  We’ve learnt a lot over the last century but I’d still say there’s a lot more we need to figure out.
  And then, understanding the human body is one thing, finding way to influence it (new drugs, genetic modifications, etc) is quite another level of difficulty.

Question: Is there a lot of things that we don't know about the human body or do we know almost everything about it?