The body's largest immune organ is the gut-associated lymphoid tissue
Grace "I understood antibodies to be produced by B cells β adaptive, post-priming immune cells. Are you saying B cells reside in the digestive tract?"
Dr. Lee "Yes. From a comparative-zoology perspective, in very primitive animals the immune cells are the digestive cells. The lancelet is a textbook example: its immune cells engulf food, break it down, and use it for nutrition. Evolutionarily, the immune system begins in the digestive tract β and it had to, because the digestive tract is the part of the body in longest contact with foreign material."
[ Figure 4-4-illust μ리 ]
νμΌλͺ
: ch4_fig4-4-illust.jpg
μ λͺ©: When the body is hungry, macrophages engulf zombie cells more efficiently
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References marked with [number] in the text will be organized and added later.
β» Detailed sources and academic references can be checked in the book Appendix.