By contracting, muscles pull on bones and allow the body to move. Muscles can only contract. They cannot actively extend, though they can move or relax back into the non-contracted neutral position. Therefore, to move bones in opposite directions, pairs of muscles must work in opposition
<span>Three keys to good health are a balanced diet, frequent exercise, and no smoking. A balanced diet will give you the nutrients you need to stay healthy, frequent exercise will keep your body in shape, and by not smoking, you're preventing yourself from becoming susceptible to certain sicknesses (i.e. lung cancer).</span>
Folic acid is good for pregnancy. I think all woman should take it during pregnancy. It helps prevent birth defects.
Hope this helps.
(I really need a crown to go on the next rank.)
Ignore the comment above.
Using blue colored plates . I think ...
Answer:
Move on
Explanation:
Because it's for the best
