Pulmonary circulationMain article:
Pulmonary circulation
The Pulmonary circulation is the portion of the cardiovascular system which transports oxygen-depleted blood away from the heart, to the lungs, and returns oxygenated blood back to the heart.
Oxygen deprived blood from the vena cava enters the right atrium of the heart and flows through the tricuspid valve into the right ventricle, from which it is pumped through the pulmonary semilunar valve into the pulmonary arteries which go to the lungs. Pulmonary veins return the now oxygen-rich blood to the heart, where it enters the left atrium before flowing through the mitral valve into the left ventricle. Then, oxygen-rich blood from the left ventricle is pumped out via the aorta, and on to the rest of the body.
Systemic circulationMain article:
Systemic circulation
Systemic circulation is the portion of the cardiovascular system which transports oxygenated blood away from the heart, to the rest of the body, and returns oxygen-depleted blood back to the heart. Systemic circulation is, distance-wise, much longer than pulmonary circulation, transporting blood to every part of the body.
okay basically biology getting even more worst than ever . i didn't go for any extra class for biology and now i'm doomed . thanks to you bio-logy >.< . i'll love you , if you treat me better okay biology . my brother said 'yg kali amek LK , nnt mesti dpt A+ mcm ans' . err please you're not that good , you just got an A on LK , maths , history , add maths , english , pend. islam and bahasa malysia , so i'll beat you on my SPM ! we'll see . okay the new kid isn't so bad . he's friendly and nice . this chinese new i'll be in Ipoh with my family . atok , opah , makcik laili , mak lang , mak ngah and all of the cousins , i missed you guys and good luck to my dearest shahamin in messir and good luck for all the cousins :) . err i feel so ugly right now :( , toodles beautiful