Biology / Unit 13 Bio 3193 short lesson, about 20 seconds
Leukocyte Types, Introduced
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The idea
Leukocytes, or white blood cells, defend the body against pathogens and comprise several distinct types, including phagocytic cells and lymphocytes, covered fully in this unit's immune-system chapter.
In practice
Leukocytes make up a far smaller share of blood volume than erythrocytes, despite their defensive importance.
Where people slip
This entry only introduces leukocytes as a blood component — their mechanisms belong to Bio 3259 onward.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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