Your heart functions in your body as a(n)
a. organ for absorbing vitamins and minerals.
b. filter for impurities.
c. series of joints responsible for endurance.
d. muscle that to pump oxygen around the body.

The correct answer is d. muscle that helps to pump oxygen around the body. The heart is made up of specialized muscle known as cardiac muscle. It pumps blood through a network of veins, capillaries and arteries. Oxygenated blood is pumped tp organs and deoxygenated blood is pumped to the lungs to replenish the supply of oxygen.

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Hello there,before the 1940s, scientists believed that proteins, rather than dna, were the carriers of genetic material in the cell. why?   answer:   proteins are present within the nucleus