Question

In the lungs, oxygen passes through the walls of the _____________ and into the blood.

cilia

trachea

vessels

alveoli


Where is the diaphragm located?

just below the trachea

just below the lungs

inside the lungs

behind the sinuses

When the diaphragm moves downward, the lungs fill with air.

True

False

The diaphragm moves upward to make us breathe in.

True

False What do capillaries do?

connect the windpipe and the lungs

filter bacteria out of the air we breathe

connect arteries and veins

help fight infection

Answer 1

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