Approximately how many times do you breathe in every day?
A. 2,000
B. 7,000
C. 12,000
D. 17,000
What is the process called that uses oxygen and results in the production of the ATP we use as energy?
Anaerobic respiration
B. Ventilation
C. Aerobic respiration
D. Circulation
The level of red blood cells in the blood is regulated by which organ(s)?
A. The heart
B. The lungs
C. The liver
D. The kidneys
To ensure sufficient oxygen diffusion, the lungs contain hundreds of millions of miniature balloon-like projections. This increases the lungs’ surface area to approximately how many square meters?
A. 10
B. 70
C. 100
D. 120