Black bile, yellow bile, phlegm and blood.
No, Hippocrates did!
It has no scientific basis.
There were supposedly four humors (black bile, yellow bile, blood and phlegm). When someone was sick, the four humors must have been out of balance and to heal, the four humors had to be balanced again.
Hippocrates discovered medicine in 400s BC.
Humors.
The four humors during the Renaissance were blood, phlegm, yellow bile, and black bile. It was believed that an imbalance of these bodily fluids in a person could cause illness.
its fun
In medieval medicine, the colors associated with the four humors were black bile (melancholic) - black, yellow bile (choleric) - yellow, blood (sanguine) - red, and phlegm (phlegmatic) - white. The balance of these humors was believed to affect a person's health and temperament.
According to Hippocrates the theories of disease causation are the 4 humors, blood, phlegm, yellow and black bile.
More like it just faded away (out of silliness), but you still hear references to it in literature ... and some old surgeons.
the aqueous and the vitreous humor
humors