BIOLOGY
BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 50, Problem 4A

Suppose that you get a paper cut while studying. Arrange the following into the correct order in time.

a. Injured epidermal cells release histamine.

b. Bacteria enter the cut.

c. Helper T cells are activated.

d. Macrophages engulf bacteria.

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