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jagDhaliwal

unit17

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Atria vs ventricles.
Atria act as receptors of deoxygenated blood, while ventricles receive blood from the left atria and force it into the aorta.
The atria stand for the upper chambers of the heart, while the ventricles are the lower chambers.
R Ventricle functions; L function
The right ventricle functions by depositing deoxygenated blood that is contained in the right atria. The right ventricle pumps blood into the lungs for purifying it. Of course the purification process is forwarded by the pulmonary valve. Pulmonary arteries transport blood into the lungs. The function of the muscled left ventricles is to receive oxygenated blood that has been pumped within left atria in the body.
The function of the left atria is to accept the purified blood from lungs from the pulmonary veins. The mitral or bicuspid valve helps prevent the blood from flowing backwards to the left part of heart until the left side of the atrium pushes blood to the left of the ventricle.
What vessels enter/exit atria and ventricles?
Aorta only exits left ventricle, right ventricle: Pulmonrary artery.
The superior and inferior vena cava feed into the right atrium. Pulmonary vein feeds into left atrium
Describe the flow of a red blood cell from the R atrium to the aortic arch, id the major structures along the way and the function associated with each structure
[First, the pulmonary circuit.]
R atrium; R ventricle; pulmonary artery (L or R); arteriole; capillary adjacent to an alveolus of lung; venule; pulmonary vein
[Now the blood returns to the heart for the systemic (body) circuit.]
L atrium; L ventricle; aorta; R iliac artery; arteriole; capillary in a toe of the R foot; venule; R femoral vein; vena cava; back to the R atrium
importance of elasticity and contractility of the arteries?
Arteries have to deal with a large and rapidly changing pressure, to do this without breaking they have to expand. However expanding reduces the blood pressure so it is important for the artery to spring back into shape. Veins don’t need to worry about all that, so have thinner walls.
What are the major arteries and veins from aortic arch, circulatory route, to right ankle, back to heart
how does blood return back to the right atrium? why should one cool down after vigorous exercise rather than abruptly stop
the blood starts at the right ventricle then goes to the semi lunar valve to the lungs via the pulmonary artery then from the lungs back to the left atrium via the pulmonary vein then through the bicuspid/ av valve to the left ventricle to the semi lunar valve through the aorta back to the body through the vena cave then to the right atrium through the tricuspid valve back to the right ventricle
location of heart in thoracic cavity
why is the wall of the left ventricle thicker than the wall of right ?
The left ventricle pumps blood at a higher pressure because it has a further distance to travel, blood from the left ventricle goes to all areas of the body. The right ventricle only has to pump blood to the lungs which is a much shorter distance, therefore less pressure is required.
why are the heart valves important? can te heart function with leaky valves/?
valves are important because the prevent the backflow of blood. This is so the fresh oxygenated blood will not be mixed with the deoxygenated blood as well as the blood running from the pulmonary side will not flow back to the aortic side. The valves keep the blood going in one direction that keeps the body stable.
why are artery walls so much thicker than those of corresponding veins
Because the blood is pumped directly into arteries so there is more pressure on the arteries.
R and L ventricles
right and left atria
aortic valve
tricupsid valve
bicuspid/mitral valve
pulmonary aterties
pulmonary veins
superior vena cava
inferior vena cava
aortic arch
brachiocephalic artery
left common carotid artery
left subclavian artery
RL common caratid artieries
internal carotid artery
external carotid artery
brachiocephalic artery
subclavian artery
axillary artery
bracial artery
radial artery
ulnar artery
abdominal aorta
hhepatatic arteries
renal artery
common iliac artery
external iliac artery
femoral artery
popliteal artery
posterior tibial artery
inferior vena cava
superior vena cava
brach. vein
internal jugular vein
subclavian vein
axillary vein
brachial vein
radial vein
ulnary vein
cephalic vein
basiliic vein
hepatic vein
renal veins
common iliac vein
external illiac vein
femoral vein
popliteal vein
anterior tibial vein
posterior tibial vein
saphenous vein
anatomy of human body
bartleby.com/107/
heart anatomy interior view
www.gwc.maricopa.edu/cclass/bio202/cyberhear/hartint0.htm
human anatomy
innerbody.com/htm/body.html
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