Unit 8 Science Systems Question Preview (ID: 19799)
V.
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___________ in the heart keep the blood moving in one direction.
a) holes
b) glands
c) valves
d)
Oxygen is carried through the body in our ___________.
a) intestines
b) blood
c) muscles
d)
______________ nodes may swell when we have an infection in our body.
a) sweat
b) oil
c) lymph
d)
Our windpipe is known as the _______________.
a) urether
b) esophagus
c) trachea
d)
In normal cases we have ________ lungs in our body.
a) 1
b) 2
c) 3
d)
Urine is produced when our _______________ filter waste from the blood.
a) lungs
b) bones
c) kidneys
d)
_____________ is a virus that attacks our immune system.
a) tuberculosis
b) influenza
c) HIV
d)
In normal conditions we have _______ kidneys.
a) 3
b) 2
c) 1
d)
A __________ is designed to prevent us from getting a virus.
a) antibiotic
b) mutation
c) vaccine
d)
The __________ is the largest artery in the body.
a) vena cava
b) aorta
c) vein
d)
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