upper part of throat behind the nose (nasopharynx)
64
New cards
thymus
gland that secrets thymosin. diminishes after puberty
65
New cards
mediastinum
space between lungs
66
New cards
thymosin
stimulates the bone marrow to manufacture T lymphocytes
67
New cards
largest lymphatic organ
spleen
68
New cards
spleen functions:
filters blood by destroying worn out red blood cells, produces lymphocytes, stores thrombocytes, reservoir for blood
69
New cards
hemolysis
breaking down of blood cells
70
New cards
which lymphatic organ controls the amount of blood in the body
spleen
71
New cards
liver
does hemolysis and stores healthy erythrocytes
72
New cards
peyer's patches
small bundle of lymphatic tissue in the walls of the small intestine. protect small intestine against pathogens that enter through the digestive tract.
73
New cards
T cell types
cytotoxic(T8), helper T cells(T4), Natural killer cells (NK), Suppressor cells
74
New cards
Cytotoxic (T8)
attach to antigens and destroy them
75
New cards
antigens
proteins on pathogen, unique to specific pathogen
76
New cards
Helper cells (T4)
aid B lymphocytes
77
New cards
NK
recognizes certain sugar patterns on pathogenic cells and targets them
78
New cards
Suppressor cells
slow or stop B lymphocytes when the pathogen has been controlled or destroyed.
79
New cards
B lymphocytes
secrete immunoglobulins and turn into plasma cells. this process is called humoral immunity
80
New cards
Ig G
main defense against infectious invaders in the body. Makes up 7% percent of immunoglobulins