Select your answer:
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Respiratory System › ViewThe walls of the alveoli and capillaries are permeable. What does this mean?
A. Substances can pass through them.
B. They are made of muscle.
C. They are located throughout the body.
D. They are made of bone.
The Brain › View
The second-largest part of the brain that is responsible in coordinating movement, posture, and balance.
A. Cerebellum
B. Cerebrum
C. Diencephalon
D. Brain Stem