The immune system of a multicellular organism has several functions. It acts primarily as a defense against foreign pathogens (such as viruses, bacteria, parasites), some poisons, as well as cancer. It also functions in the return of extracellular fluid to the blood, and the formation of white blood cells.
Subcategories
There are 4 subcategories to this category.
B
C
L
d
Articles in category "Immune system"
There are 29 articles in this category.