MASS TRANSPORT Flashcards
why is the muscle of the left ventricle thicker than the muscle of the right ventricle
left ventricle pumps blood via the aorta all around the body to all body cells
has a higher pressure to travel a greater distance
pulmonary vein
carries oxygenated blood back to the left side of the heart from the lungs
aorta
pumps blood at a high pressure to body cells from the left side of the heart
vena cava
returns deoxygenated blood to the right side of the heart from body cells
pulmonary artery
carries deoxygenated blood from the right side of the heart to the lungs to become oxygenated
the heart itself
closed circuit - blood min blood vessels
double circuit - 1 delivers blood to the lungs and the other delivers blood to the body
blood in the lungs at a lower pressure to prevent damage to the capillaries
blood to the body at higher pressure to ensure blood reaches all cells
coronary arteries
deliver oxygenated blood to the heart muscle
branch off aorta
blocked coronary arteries means the cardiac muscle is starved of oxygen so no respiration occurs so cells die and so myocardial infarction occurs
which vessel transports blood to the liver
hepatic artery
which vessel transports blood to the kidneys
renal artery
which vessel takes blood away from the liver
hepatic vein
which vessel takes blood away from the kidneys
renal vein
cardiac muscle
myogenic - can contract and relax without nervous / hormonal stimulation
never fatigues - coronary arteries constantly supply them with oxygen
what is myocardial infarction
heart attack
valves
prevent backflow
open when pressure is higher behind
close when pressure is higher in front
septum
separates deoxygenated from oxygenated blood
maintains high concentration of oxygen in oxygenated blood to maintain steep concentration gradient for diffusion
