Aerobic respiration produces energy for the cells called
lactic acid
ATP
mitochondria
DNA
Which organ systems work together to get oxygen to our cells?
respiratory
skeletal
digestive
lymphatic
circulatory
Oxygen and carbon dioxide diffuse across how many layers?
one
two
three
many
none
If you flattened out all your alveoli then the surface area would be as large as
a fingernail
a large pizza
a tennis court
a football field
What happens to the chest cavity when the diaphragm contracts (pushes down)?
pressure increases, volume decreases
pressure decreases, volume increases
pressure and volume increase
pressure and volume decrease
Where do you find hemoglobin?
lungs
brain
heart
alveoli
red blood cells
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