POP QUIZ

What is the most plentiful substance in the human body, making up 55% to 65% of an adult’s body weight?

* See answer, S4

POP QUIZ ANSWER: Water. It’s important to the body for many reasons, including its role in regulating body temperature, in digestion and elimination, and in maintenance of the immune system. It also carries nutrients, hormones and antibodies to and from cells. (Question on S1.)