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Unit 1:
Ch. 1
Ch. 2
Ch. 3
Interlude A
Unit 2:
Ch. 4
Ch. 5
Ch. 6
Ch. 7
Ch. 8
Ch. 9
Interlude B
Unit 3:
Ch. 10
Ch. 11
Ch. 12
Ch. 13
Ch. 14
Ch. 15
Interlude C
Unit 4:
Ch. 16
Ch. 17
Ch. 18
Ch. 19
Interlude D
Unit 5:
Ch. 20
Ch. 21
Ch. 22
Ch. 23
Ch. 24
Ch. 25
Ch. 26
Ch. 27
Ch. 28
Ch. 29
Ch. 30
Interlude E
Unit 6:
Ch. 31
Ch. 32
Interlude F
Unit 7:
Ch. 33
Ch. 34
Ch. 35
Ch. 36
Ch. 37
Ch. 38
Interlude G
The animations require the latest Flash 7 and Shockwave plug-ins.
28.1: Activity: The vertebrate immune system

Test your recall for figure 28.6 with this key figure labeling exercise.

28.2 Tutorial: Recognizing and attacking invaders of the body
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This tutorial explores the two main branches of the immune system—humoral immunity and cell-mediated immunity.

28.3: Tutorial: Why is AIDS so deadly?
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This tutorial examines how HIV weakens the immune system by infecting macrophages and helper T lymphocytes, leaving the body open to attack by other invaders.

28.1: Process Animation: How Antibodies Work
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» View animation

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Norton Gradebook

Instructors now have an easy way to collect students’ online quizzes with the Norton Gradebook without flooding their inboxes with e-mails.

Students can track their online quiz scores by setting up their own Student Gradebook.