Immune System, Part 1: Crash Course Anatomy & Physiology #45
9:13
YouTubeCrashCourse
Immune System, Part 1: Crash Course Anatomy & Physiology #45
Our final episodes of Anatomy & Physiology explore the way your body keeps all that complex, intricate stuff alive and healthy -- your immune system. The immune system’s responses begin with physical barriers like skin and mucous membranes, and when they’re not enough, there are phagocytes -- the neutrophils and macrophages. It also ...
7M viewsDec 8, 2015
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