Brain chemistry. is the answer
Answer:
muscular system help to protect our body system.
It also protect our body system from direct contact of germs.
Answer:
It is a supernumerary nipple.
Explanation: A supernumerary nipple is one or more extra nipples in addition to the two that everyone has. It is a birth defect that does not have any risk. A supernumerary nipple is smaller than the normal ones and it can be located in the abdomen, near the armpit, down the chest or near the groin.