Function of blood in our body​

The outermost layer of your teeth is called the enamel and is made of?

Name three bad things that can happen to a teenager who has no refusal skills and no self-control:

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)