immune response

the body’s specific protective
response to invading foreign agent or
organism

the study of diseases
that result from dysfunction of the
immune system

Major components of the Immune System

Cells of the immune system

40-70% 0f WBC; circulating phagocytes
that are poised to respond quickly & in
vast #s where the tissue injury occurred
the first cells to arrive at the site; leave
vascular compartment & enter tissue
spaces searching out bacteria or cell
debris

2-5% of WBCs; Phagocytic, but not as
effective as Neutrophils

are thought to protect humans against
parasitic worm infection e.g. pin worms,
tapeworms. Also, have a role in allergic
reactions

0.2% of leukocytes. Functions in allergic
reactions.

circulate in the blood; mature becomes
macrophages & migrate to tissues

literally means big eaters

responsible for removing antigens, damaged
cells, cellular debris by phagocytosis

originate from stem cells in the bone marrow
and mature into either T cells or B cells

B lymphocytes mature in the ___________

T lymphocytes mature in the
________ where they also differentiate into
cells with various functions

development of B lymphocytes

development of T lymphocytes

T cells include: