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chap 15 p.2
| Question | Answer |
|---|---|
| 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
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