Unit 1 Multiple Choice — The Human Body

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INSTRUCTIONS:

INSTRUCTIONS: Select the best definition (or usage) of the key term (or phrase) below.

noun (thing)

Question 1 of 20

Brain

The mass of nerve tissue located in the head of animals with spinal cords; it is the center of thought and controls movement.

The organ that controls the flow of blood in the body.

Either of a pair of oval masses of lymphoid tissue, one on each side of the throat at the back of the mouth.

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