Lesson · B.5.2

The immune system

How the innate and adaptive immune systems defend the body, the cells each one relies on, and why HESI A2 Biology questions hinge on telling the two apart.

ObjectiveB.5.2Read4 minExam weightMicrobiology and Immunity ≈ 16% of Biology

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What this lesson covers

How the innate and adaptive immune systems defend the body, the cells each one relies on, and why HESI A2 Biology questions hinge on telling the two apart.