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The Cardiovascular and Respiratory Systems Answers

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8

The human cardiovascular system is considered closed because __________.

A
blood is continuously circulated in the body.
B
blood provides nutrients to organs.
C
blood collects oxygen from the lungs
D
there are no holes for blood to enter or leave the system
11

Air is warmed and moisten as it moves through both the mouth and nasal passages. Please select the best answer from the choices provided.

A
T
B
F
14

What percentage of blood is made up of plasma?

A
55%
B
40%
C
10%
D
5%
15

Once entering the nose, air moves through both the pharynx and larynx.

A
T
B
F
17

Your friend Amanda suffers from a condition that reduces her blood's ability to carry oxygen. Which of the following is the name of that condition?

A
emphysema
B
hemophilia
C
leukemia
D
anemia
18

Each lung is fed oxygen by a separate bronchus.

A
T
B
F
19

What function do capillaries serve in the cardiovascular system?

A
carry blood to the brain
B
return blood to the lungs
C
help control body temperature
D
replace old blood cells
20

What function do capillaries serve in the cardiovascular system?

A
carry blood to the brain
B
return blood to the lungs
C
help control body temperature
D
replace old blood cells

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