The heart 7.4

How does deoxygenated blood travel around the body
Vena cava, right atrium,tricuspid valve right ventricle,pulmonary artery, lungs
1 of 17
how does oxygenated blood travel around the body
Lungs, pulmonary vein left atrium, bicuspid valve, left ventricle, aorta, body
2 of 17
how does nervous control of the cardiac cycle happen
sinoatrial node send signal causing both atria walls to contract,signal reaches av node and goes down purkinje fibres,causes ventricles to contract from the bottom up.
3 of 17
Diastole relaxation
Blood comes in through pulmonary vein,atria fill with blood pressure rises,atrioventricular valves open blood passes into ventricles aided by gravity relaxation of ventricle walls causes a recoil and reduce pressure in ventricle
4 of 17
atrial systole
atria push blood into ventricles,.semilunar close,atrioventricular valves open
5 of 17
ventricular systole
ventricles contract simultaneously,this increase in blood pressure causes atrioventricular valves shut blood is then pumped into the vessels
6 of 17
what are the roles and properties of the Arteries
Blood pumped into arteries by ventricles, take blood from the heart, thick wall,elastic fibres,smalll lumen, high pressure
7 of 17
what are the properties of arterioles
Smaller branched arteries • Deliver oxygen to tissues • Smaller in diameter • Blood moves slightly slower to allow diffusion across capillary walls
8 of 17
what are the roles and properties of veins
bring blood to heart,valves to stop backflow,pressure low, thin walls,large lumen,thin outer walls
9 of 17
what are the roles and properties of capillaries
link between arteries and veins,diffusion occurs,one cell thick,small lumen, steady blood flow.
10 of 17
what are the blood vessels the heart has which supply it with its own oxygen
coronary arteries
11 of 17
what are the atrioventricular valves
between left atrium and ventricle and right atrium and ventricle prevent backflow of blood.Ensures that blood within them moves to the aorta and pulmonary artery
12 of 17
What are the semi lunar valves
Prevent backflow of blood into ventricles
13 of 17
How do semi lunar valves prevent backflow of blood
elastic walls recoil increasing the pressure and when the ventricles relax it reduces the pressure
14 of 17
what do pocket valves ensure
when veins are squeezed blood flows back towards the heart
15 of 17
how do you work out cardiac output
Cardiac output=heart rate x stroke volume
16 of 17
describe the formation of tissue fluid
blood in arteriolar end of capillary has a high water potential, in it it has alot of ions,these molecules are forced through the capillary lining, this is ultrafiltration, by the time blood reaches the venous end it has lost water, pressure reduced
17 of 17

Other cards in this set

Card 2

Front

how does oxygenated blood travel around the body

Back

Lungs, pulmonary vein left atrium, bicuspid valve, left ventricle, aorta, body

Card 3

Front

how does nervous control of the cardiac cycle happen

Back

Preview of the front of card 3

Card 4

Front

Diastole relaxation

Back

Preview of the front of card 4

Card 5

Front

atrial systole

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes and structure resources »