____________________ blood cells are a kind of defensive cell found in the interstitial fluid between the cells in the most vulnerable parts of the body and circulating in the blood.
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Q51: The fetus of a lion receives antibodies
Q52: At various points along the lymphatic ducts
Q52: A disease-causing agent is called a(n)_.
Q53: Interferons summon _ cells that destroy any
Q54: A lymphocyte is activated when unique _-binding
Q55: _ nodes are pockets that contain specialized
Q57: A vaccine contains
A)antibodies.
B)active B cells.
C)antigens.
D)active killer T
Q59: The _ immune system is a specific
Q60: Macrophages and neutrophils make up a _
Q61: A vaccine stimulates the formation of _
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