Which choice best describes the function of the haversian (central) canals within bone?

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)

When a doctor suspects that a patient may have diabetes based on what symptoms?

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.