Question

What is the diaphragm?
a. the lining of the lungs
b. a muscle which connects the ribs together
c. sheet of muscle at the bottom of the rib cage
d. a tube connecting the mouth to the lungs

Oxygen is able to pass from the lungs to the blood because
a. the walls of the alveoli are dry.
b. the walls of the alveoli are thick.
c. the walls of the alveoli are thin.
d. there are only a few alveoli.

What part of the blood carries dissolved food material?
a. plasma
b. platelets
c. red blood cells
d. white blood cells
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Answer 1

Answer:

1.c.sheet of muscle at the bottom of the rib cage

2.c. the walls of the alveoli are thin.

3.a. Plasma