Sleep researchers use a(n) to study brain waves of people while they are asleep.

How does fluid in the body become lymph? how is it returned to your blood

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny.i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

Having health insurance means that a family cannot go bankrupt due to medical expenses. true or false?