★ Circulatory System Quiz
What function does the heart do?
A. Protects organs and produces red blood cells.
B. Generates heat.
C. Breaks down food into nutrients.
D. The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.
Select your answer:
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Cells › Viewcell organelle where proteins are made
A. ribosomes
B. mitochondria
C. centrioles
D. endoplasmic reticulum
Health › View
The amount of energy released when nutrients are broken down is measured in units called
A. grams
B. calories
C. ounces
D. pounds