Immune and Lymph Flashcards
what is the process in which the body protects itself
white blood cells chemically notify t cells which begin to reproduce themselves and create chemicals that notice the b cells which begin to reproduce themselves and produce antibodies that seek out and destroy the foreign cells. once the virus cells have been destroyed the cells are notified to return to dormant state. some of the t cells remain as memory cells so that they can quickly re-attack
if the same foreign cell ever enters the body again.
what does the p wave show
atrial contraction
what does the qrs wave show
indicates occurrence of ventricular contraction
what does t wave show
end of ventricular contraction
what does the lymph system do
drains tissue spaces and cavities of fluid that has leaked out of the capillaries and returns them to the blood stream
what is lymph
watery substnace that is often milky in colour
what does lymph contian
proteins that have excaped thorugh the capillary walls
where is the greatest concentration of lymph nodes
neck, armpits, groin
what is each lymph node
comparmentalized mass of tissue that harbours lumphocytes
where do foreing materials within the tissue go
are swept into the lymph nodes where they are attacked by lymphocytes
whats lub sound
closing of AV valves and blood slapping against them when the bentricles are full are are about to contract
whats dub sound
closing of semilunar valves after blood ahs left the ventricles and blood hitting or slapping against them
whats dub sound
closing of semilunar valves after blood ahs left the ventricles and blood hitting or slapping against them
what system slows heart rate
parasympathetic
what system increases heart rate
sympathetic
