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chap 15 p.2

5 blood vessel types in human body arteries, arterolies,capillaries,venules, veins
blood vessle type that carries blood back to heart vein
blood ves. type that carries blood to cap. arterioles
bl. ves. type carries blood away from heart arteries
blood ves. where gases are exchanged with bodys tissues capillaries
blood ves. type that capillaries empty into venules
blood in arterties 02
blood arterioles 02
blood in venules CO2
blood in veins CO2
capillaries blood CO2 and 02
largest blo. ves in diameter vein
largest artery aorta artery
two tissue types found in walls of artery smooth muscle and elstic tissue
describe blood pressure in arteries vs. veins arteris have low blood pressure
walls of capillaries sinusoids(leaky)
what function of precapillary sphincters? where are they located junction b/t capillaries and arterioles; control blood flow to capillaries
what type of enviroment within the tissue will cause precap. to open/ close low oxygen and nutrients to open; high amts to close
venuous valves located arms and legs
function of venuous valves prevent blood from falling backwards
why are venuous valves needed? bc there are low b.p in veins and also gravitational pull of arms and legs
blood vol. of veins 60-70
cap. blood vol 5
systemic arteries blood vol. 10-12
blood pressure means force against inner walls of Blood vessles
blood pressure avg. adult 120/80
distolic min presure
systolic max pressure
why dont we take b.p from our veins low pressure
what artery is used to for blood pressure brachial
4 pressure points take pules temporal, brachial, facial, radial
stroke volume amt of blood pumped per heart beat
blood viscosity blood thickness
peripheral resistance blood ves. are stretched
blood vol. amt of blood in body
heart rate beats per min
baroreceptors located arteries
function of baroreceptors dectect b.p changes in arteries
3 pumps produce circulation in body 1. heart2. respitory3.skeletal
res. pump function abdominals contract which sends blood back up
skeletal muscle pump function contraction of skeletal muclse squeeze blood back to heart
4 life span changes within cardiovascular system 1. heart enlargement2.death of cardiac muscle3. increase in adipose tissue of heart4. incrase in B.P
why is the loss of cardiac cells thought of as irreversable cells dont regenerate
why does our heart enlarge as we get to old age chordae tendone stretches and are loosen
why does our heart rate decrease with old age due to weight loss
four chambers and valves found in the heart R-al-ar-vl-vl-a-v , r-a-v, pul, and aortia
Created by: Mollie28