B. They have spinal cords
I'd say B, because Electronics usually wake me up. She should turn them off.
The answer is Recreation because there is nothing that needs to be recreated
The correct answer is letter C.
Capillaries are blood vessels responsible for the exchange of gases and nutrients within tissues. They are branching blood vessels that create series of networks between the arterioles and the venules that have hairlike thinness in diameter.
Answer:
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. Inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
Explanation:
