3 organ systems that work together to make your body move (FREE BRAINLIEST)

There are many different systems involved in when we exercise, the three main ones are the Respiratory system which is involved in breathing the circulatory system which is about circulation of blood around the body and finally the muscular system and finally the Muscular system which is about how we move.

Explanation:

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times