Topics: Pathophysiology Quiz
The tiny blood vessels that allow substances to move in and out of the blood stream, like oxygen and carbon dioxide, are called:
A. aortas
B. bronchioles
C. veins
D. capillaries
Select your answer:

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Anatomy Bones › ViewThe center of a long bone is called the:
A. Diaphysis
B. Periosteum
Nervous / Sensory System › View
The outer ear, responsible for gathering and focusing sound waves, is called the
A. anvil
B. pinna
C. stirrup
D. cochlea