ScienceQuestion 72 of 120
Which of the following best describes the function of the heart?
a.It filters waste from the blood.
b.It controls breathing rate.
c.It produces digestive enzymes.
d.It pumps blood throughout the body.
Explanation
The heart is a muscular pump that circulates blood, delivering oxygen and nutrients to the body. The kidneys filter waste, and the pancreas produces digestive enzymes. Circulation keeps every cell supplied with what it needs.
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