1324ChemistryMedium
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
A89%
B73%
C81%
D75%
Correct answer
B. 73%
Explanation
According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.