The answer is D unrestricted whaling could lead to their extinction.
Answer:
Oxygen enters the body in the mouth and nose, passes through the larynx and the trachea. The trachea splits into two bronchial tubes, which lead to smaller tubes that lead to 600 million alveoli, which are small sacs surrounded by capillaries. The capillaries take oxygen into the arteries, and the oxygen-rich blood is then pumped into every cell of your body. Once the oxygen has been absorbed, carbon dioxide and water are eliminated through the lungs.
Explanation:
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Capillaries: <span>any of the fine branching blood vessels that form a network between the arterioles and venules.</span>
The answer is d because the ovary's job is twofold. They produce the hormones including estrogen.
