circulation
what are the main functions for the heart
transport of blood
temperature regulation
protection
what are the main components of the heart
the heart, arteries, blood
what are the 3 types of circulation
systemic, pulmonary, cardiac
where does the blood go in systemic
body wide
where does the blood go during pulmonary
to the lungs
where does the blood go in cardiac circulation
to the heart!
what do arteries carry?
oxygenated blood!
where do arteries take oxygenated blood
always away from the heart!
what do arteries have?
thick walls and lidpid lining
what are arterioles?
smaller verison of arteries
what do veins have?
thinner walls, muscles
what are veins for?
to keep blood flowing in 1 direction
where are the veins connected to?
valves ! (pulmonaries are an exception)
how can we differenciate capillaries
very thin walls
whag are capillaries for?
for diffusion!!
what does the heart do?
pumps blood! keeps oxygen rich blood and oxygen poor blood separated
how many chambers does fhe heart have?
4 chambers!
what makes the lub dub sounds?
the valves!
what makes the lub
av valves
what makes the dub
semi lunar valves
where can the SA node be located
in the right atrium
what does the av node do?
it sends the signal for the heart ti pump blood
what is blood pressure?
its the force of blood on the walls of the arteries
what is systolic
its the max pressure in the ventricule when it contracts
what is diastolic
its the max pressure in the atria when if contracts
waht do we use to measure blood pressure
sphygmomanometer
what do Baroreceptors do
it detects the blood prssure in the ariterial walls
what happenes ifm blood pressure is too high
vasodilation, a decrease in cardiac output, removes water from blood
what happens when blood prssure is too low
vasocontrriction, increase in cardiac output and more water in the blood
where are strokes mainly found
in the brain
what does embolism mean?
blockage
what are ateriosclerosis ?
it's when the walls of Ateries thicken and lose their estalicity becoming harder
what is plasma
plasma is the fluid portion of the blood and is bright yellow
what does plasma contain
water, gases, vitamins, minerals, hormones, wates and proteins
what do red blood cells contain
no nucleus, has hemoglobin
what does the white blood cell have
a necleus
what is the white blood cell apart of?
the immune system
what are platelets for?
blood clotting
what us blood made out of
plasma, white blood cells, red blood cells and platelets
when does vasodilation happen
when the body is too hot and when blood pressure is too high
when does vasoconstrictioj happen
when the body is too cold and when blood oressure is too low
what are antigens
its what you body already has
eg. blood type A had A antigens
what are antibodies
it is what your body makes for the antigens you dong have
eg. blood type A+ would have anti b antibodies
what are our body's physical barriers
skin, mucus, cillia, eyelashes
what isbcell mediated immunity?
macrophages !
what do macrophages do?
eats cells!
what is dead macophahes
pus (ew)
what are the antibody mediated immunities
macrophages, helper t-cells, b cells, killer t cells, memory t cells
what are the 3 types of t cells
helper, killer, memory