the fact that the velocity of blood flow speeds up when the blood moves from the arterioles into the capillaries.

the active transport of non-lipid soluble substances across the capillary wall.

the free movement of water and small solutes out of and in to the capillaries through numerous small pores in the capillary wall.

the process whereby lipid soluble substances such as oxygen and carbon dioxide are rapidly exchanged between the tissue cells and the blood in the capillaries.

an increase in filtration of water and small solutes from the blood into the interstitial fluid.

all of the above

a compensatory decrease in plasma osmotic pressure.

a compensatory decrease in pressure in the arterioles leading into the capillaries.

of the large diameter of the main arteries leaving the heart.

pre-capillary sphincters open during diastole allowing blood to enter the capillaries.

the arterioles dilate during diastole, which increases the pressure difference between the arteries and arterioles.

of elastic recoil of the walls of the arteries which had been stretched by blood entering the arteries during systole.

flows to the lungs and is de-oxygenated.

flows to the the left atrium and is oxygenated.

the right ventricle and is de-oxygenated.

flows to the right atrium and is de-oxygenated.

the velocity of blood flow through the capillaries and the right atrial pressure.

the cardiac output and whether the venous valves are open or closed.

the velocity of blood flow through the capillaries and the level of parasympathetic stimulation to the smooth muscle of the vein walls.

the volume of blood in the veins and the distensibility of the vein walls.

increase the ejection fraction.

cause all of the above to occur.

increase the rate of slow depolarisation (pacemaker potential) in sino-atrial node cells.

decrease the duration of diastole.

the left ventricle is closer to the rib cage and therefore needs extra cushioning to protect it.

the left ventricle must pump the same amount of blood as the right ventricle but must do this at a much higher pressure.

the left ventricle must pump oxygenated blood, which requires more energy than pumping unoxygenated blood.

the left ventricle must pump much more blood than the right ventricle so it must have stronger walls.

the ventricles would start contracting at a higher than normal rate.

the heart would stop responding to sympathetic and parasympathetic stimulation.

the ventricles would stop contracting.

contraction of the atria and ventricles would no longer be coordinated.

increases when there is an increase in total peripheral resistance.

is an important factor in determining cardiac output.

normally depends only on the volume of blood in the veins.

is not important in determining flow of blood into the heart.