2006-08-24 11:44:56 · 23 answers · asked by im_teen_chick 1 in Science & Mathematics ➔ Biology
circulatory system
(also called the cardiovascular system in biology class)
2006-08-24 11:46:13 · answer #1 · answered by Eugena 3 · 1⤊ 1⤋
The Circulatory System
2006-08-24 11:53:11 · answer #2 · answered by Anonymous · 0⤊ 1⤋
The answer is the cardiovascular system. You see, the system works in the following way:
The heart is a muscle that pumps blood through the hole body; it gives blood pressure for it to be able to flow. It is completely diveded into two different parts by the "interventricular septum". On the left side, oxygenated blood flows, and on the right side, deoxygenated blood flows.
Each of which is divided into two chambers; the two upper chambers are calles "atria", and the lower ones are called "ventricles".
Dexygenated blood, coming from the tissues, arrives to the right atrium by means of the vena-cava veins (there is the "lower" and "upper" vena-cava: each bringing deoxygentaed blood from different parts of the body). After entering the right atrium, a valve called "atrioventricular valve", which conects each atria with its ventricle, opens. Therefore, the blood goes into the right ventricle.
Then, thick muscular walls of the heart pump blood to the lungs. Blood travels to the lungs in the pulmonary artery. In the lungs, gas exchange takes place... by diffusion it earns oxygen and loses carbon dioxide. The gas exchange takes place at the level of the capillaries (the samllest blood vessels).
When it comes back from the lungs, it enters the left atrium (being oxygenated), by means of the pulmonary vein. It then passes through the atrioventricular valve and after going to the left ventricle, it is pump to all the tissues by means of the aorta artery.
The purpose is for this blood to reach the tissues, and for them to oxygenate.
As as to the blood vessels, there are three different types:
- arteries: thick, muscular walls. Blood flows at a high pressure due to the fact that a lot of pressure is made by the ventricles of the heart, and because of structure factors.
- veins: they have a thinner wall and a lower pressure
- capillaries: they have a very thin wall. Blood flows at a very low pressure because gas exchange takes place.
But of course... this system does not only consists on the delivery of oxygen to the cells, but of nutrients too.
bY means of the blood, wastes are removed too.
2006-08-24 12:16:14 · answer #3 · answered by sbdy 1 · 1⤊ 1⤋
Cardiovascular System.
2006-08-24 11:47:33 · answer #4 · answered by sahara 3 · 0⤊ 1⤋
Circulatory.
2006-08-24 11:46:43 · answer #5 · answered by Goldenrain 6 · 0⤊ 1⤋
That's our circulatory system.It's controlled by the autonomic system just as our breathing is.
2006-08-24 11:47:12 · answer #6 · answered by joecseko 6 · 0⤊ 1⤋
Circulatory system
2006-08-24 11:46:59 · answer #7 · answered by NANCY K 6 · 0⤊ 1⤋
The circulatory system.
2006-08-25 14:07:06 · answer #8 · answered by sciencegyul 1 · 0⤊ 1⤋
the Cardiovascular System
2006-08-24 11:47:02 · answer #9 · answered by Anonymous · 0⤊ 2⤋
the cardiovascular (otherwise known as the circulatory) system
2006-08-24 13:13:50 · answer #10 · answered by eet2006 3 · 0⤊ 1⤋