Answer:
is part of the cardiovascular system;
pumps blood to the cells in the body works;
closely with the lungs
Explanation:
The heart is a muscle that pumps blood through the blood vessels and that is the essential function. It is the main and central organ of the circulatory system.
The heart weights between 200 and 425 grams. It is located between lungs, in the middle of the chest and it is divided into four chambers in humans, other mammals, and birds heart.
The diaphragm moves upward, making the chest cavity larger, and air flows in.
Two hormonal methods of contraception are birth control pills and implants. The pills are taken daily or 3 weeks out of the month and typically have two major hormones that prevent ovulation. The implant is a device placed in the arm that releases hormones constantly to prevent ovulation for up to 3 to 5 years.
Hope this helps! :)
False the have the same energy per gram.
