Answer:

Muscoskeletal keeps your body in shape and of balance, without this. You will fall down repeatedly and without shape, The Inegumentary system is your first defense of the immune system and is also a shield for your insides, or in simpler terms, "meat shield". The digestive system will remove useless food and body waste and is the production of healthy nutrients throughout your body and your cells. your Respiratory system is the source of your oxygen, the reason why we breathe is to differentiate us with underwater beings and creatures with us ground mammals. And the Respiratory makes us breathe and take in oxygen and also release oxygen, like exhaling, farting. Our Circulatory system is used to pump blood and our red blood cells to deliver nutrients and oxygen. The nervous system is used to identify your emotions. if you're in an intense corner, you get the immediate flight or fight message in your head.  

Explanation:

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