Answer: I believe it is C: delivers nutrients to cells, removes cellular waste, and fights infection.
Forgive me if im wrong but its what I choose on the exam
Test tube babies are a babies conceived by in vitro fertilization.
in virto fertilization is a process by which an egg is fertilised by sperm outside the body.
hope this helps :)
The answer is B, pollution releases because it negatively affects the environment
The Major function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli, the layers of the cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other, the barrier between air and blood averages about 1 micron in thickness. Oxygen diffuses quickly through the air-blood barrier into the blood in the capillaries. Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled.
