Oxygen’s surprisingly complex journey through your body - Enda B

What vital organs work together to sustain life by delivering oxygen to tissues?

• Gut, brain, bones, lungs, blood, and heart

• Kidneys, liver, stomach, muscles, and skin

• Pancreas, spleen, bladder, nerves, and hair

• Eyes, ears, nose, tongue, and skin

Why do most cells need oxygen?

• To help with digestion.

• It is a key ingredient for aerobic respiration, which produces ATP.

• To regulate body temperature.

• To strengthen bones.

Where are red blood cells primarily produced in the body?

• The brain

• The lungs

• The bone marrow

• The stomach

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What are the miniature balloon-like projections in the lungs that dramatically increase the contact area for oxygen diffusion?

• Bronchioles

• Trachea

• Alveoli

• Diaphragm

How many times does the human heart pump blood on average per day?

• Approximately 1,000 times

• Approximately 10,000 times

• Approximately 100,000 times

• Approximately 1,000,000 times