TedEd: Oxygen's journey through the body

Approximately how many times do you breathe in every day?

• 2,000

• 7,000

• 12,000

• 17,000

What is the process called that uses oxygen and results in the production of the ATP we use as energy?

• Anaerobic respiration

• Ventilation

• Aerobic respiration

• Circulation

What is the building block of hemoglobin?

• erythropietin

• iron

• hematocrit

• carbon dioxide

The level of red blood cells in the blood is regulated by which organ(s)?

• The heart

• The lungs

• The liver

• The kidneys

To ensure sufficient oxygen diffusion, the lungs contain hundreds of millions of miniature balloon-like projections called?

• Alveoli

• Ravioli

• Type I pneumocytes

• Type II pneumocytes

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?

• 10

• 70

• 90

• 100

Why must the alveoli cell walls be so thin?

• So that oxygen and CO2 can get close enough to diffuse between the wall of the capillaries

• So the blood can flow into the alveoli.

• So the pneumocytes can travel through the alveoli.

• So that nutrients can get close enough to diffuse.