Page 2, History of Cardiovascular Physiology, Dr. D. Penney

Hippocrates and Galen:

In the 3rd century B.C., Hippocrates stated the concepts of health. He believed there were 4 humors: blood, yellow bile found in the gall bladder, black bile found in the spleen, and phlegm found in the pituitary gland.

Several centuries later Galen developed a comprehensive system to explain bodily function and disease processes (Figure 1). He added to Hippocrates ideas, by stating that there were three spirits: natural spirit of the liver, vital spirit of the heart, and animal spirit of the brain. Galen's dogma of medicine remained essentially unchanged for 1500 yrs.

Next Page

Return to Index