Science Notebook - Student Edition

380 The Immune System

Nonspecific

Immunity

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on page.

Specific

Immunity

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on page.

Summarize nonspecific immune defenses by completing the table.

Section 37.2 The Immune System (continued)

Main Idea Details

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Compare the functions of these organs of the lymphatic system.

Defense How it Works

Skin

Saliva, tears, and

nasal secretions

Mucus blocks bacteria from sticking to inner epithelial

cells; inner surfaces secrete extra mucus when

infected, triggering coughing that helps move

infected mucus out of the body

Stomach acid

Phagocytosis

Interferon

Inflammatory

response

chemicals released by invaders and body cells

attract phagocytes, increase blood flow to

area, and make blood vessels more permeable

to allow white blood cells to escape; result is

more white blood cells in the area

Lymph

Nodes Tonsils Spleen

Thymus

Gland