human anatomy?

The heart is divided in 4 chambers, 2 atriums (left and right) and two ventricules (also left and right). The blood arrives at the atriums from outside the heart, fron the superior and inferior cava (sistemic blood) to the right atrium, then it passes the tricuspide valve into the right ventricule, and then it exits through the pulmonary arteries (only arteries in the body that carry venous blood) to the lungs, where it gets oxigenated and then returns through the pulmonary veins to the left atrium, then through the mitral valve to the left ventricule, and finally it exists through the aortic valve to the aorta. Also the heart has its own blood flow, given by the coronary arteries, one in the right, and one in the left, that begin in the aorta. The right one has two principle branches, the posterior descendent and the marginal. The left one has de anterior descendente and the circunflex. The conduction system originates its impulses in the sinosal node, then to the atrioventricular node, and finally through the Hiss fibers distributes the impulse to the muscle which in turn contracts. The ventricules are diveded by a septum. Also other parts that are important, mainly in what ischemia refers, are the lateral wall (left ventricle), apex (the tip), posterior and anterior walls (left ventricle).

2007-01-05 09:18:04 · answer #1 · answered by Tico Calamity 3 · 0⤊ 0⤋

What is the 'question'?

Well...
The heart is a hollow muscular organ... The heart has four chambers... The 2 upper chambers are called atria (atrium; singular)... The two lower chambers are called ventricles... Pericardium covers the heart... Pulmonary artery carries the blood from the heart to lungs... Aorta carries the blood from the heart to the body... Vena cava carries the blood to the heart [superior(above) and inferior(below)]...

2007-01-04 23:11:15 · answer #2 · answered by leda_lertz 2 · 0⤊ 0⤋

Check out Wikipedia. You have posted no question.

2007-01-04 17:51:26 · answer #3 · answered by mathlete1 3 · 0⤊ 0⤋

Whats the question?

2007-01-04 17:38:50 · answer #4 · answered by beach bum 3 · 0⤊ 0⤋

http://images.google.com/images?hl=en&lr=&q=heart%20anatomy&btnG=Search&ie=UTF-8&oe=UTF-8&sa=N&tab=wi

2007-01-04 17:39:48 · answer #5 · answered by Amazing_clarity 4 · 0⤊ 0⤋

this is a good diagram

http://images.google.com/imgres?imgurl=http://biosphere.biologydaily.com/help/images/a366024055e25bfcd7ffb9005e0fcaa0-5409.jpeg&imgrefurl=http://biosphere.biologydaily.com/help/node/5409&h=456&w=450&sz=42&tbnid=LE1VeQXSTSwyyM:&tbnh=128&tbnw=126&prev=/images%3Fq%3Dhuman%2Bheart&start=1&sa=X&oi=images&ct=image&cd=1

2007-01-08 17:34:38 · answer #6 · answered by Anonymous · 0⤊ 0⤋

You suck at the internet.

2007-01-04 19:04:33 · answer #7 · answered by IU Med 2 · 0⤊ 0⤋

7 answers