Topics: Circulatory System Quiz
What allows blood to move from the atrium into the ventricles?
A. Pumping of the heart muscle
B. passing through the aorta
C. opening of a valve
D. closing of pulmonary artery
Select your answer:
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Disease, Immunity, and Phatogens › ViewWhat traps germs in your respiratory system?
A. White Blood Cells
B. Stomach Acid
C. Mucus
D. Air
Respiratory and Circulatory › View
The dome-shaped muscle that helps you breathe.
A. diaphragm
B. lungs
C. stomach
D. bicep