The heart is the system's pump and the blood vessels are like the delivery routes and it is a muscle. The pumps are the beat. The heart is a muscle about the size of a fist and it is the muscle in the body that works the hardest. The statement that the heart muscle rests only between beats is true
Due to chemical changes in the brain during PMS, a women can become extra moody (volatile, even), swollen breasts, bloating, fatigue, cravings for chocolate.
Answer:
Water is a main component of our body which provides organs with the things they need such as oxygen and hydrogen
Explanation:
False, a variation is a change an adaption is what helps an organism reproduce and survive
