2006-08-24 02:57:59 · 9 answers · asked by lildot2 1 in Education & Reference ➔ Homework Help
A circulatory system (cardiovascular system in biology classes) is an organ system that moves substances to and from cells; it can also help stabilize body temperature and pH (part of homeostasis).
The circulatory system functions in the delivery of oxygen, nutrient molecules, and hormones and the removal of carbon dioxide, ammonia and other metabolic wastes. Capillaries are the points of exchange between the blood and surrounding tissues. Materials cross in and out of the capillaries by passing through or between the cells that line the capillary.
There are three types of circulatory systems (from simplest to most complex): no circulatory system, open circulatory system, and closed circulatory system.
Deoxygenated blood (containing little or no oxygen) collects in two major veins: the superior vena cava and the inferior vena cava. The superior and inferior vena cava empty into the right atrium. The coronary sinus which brings blood back from the heart itself also empties into the right atrium. The right atrium is the larger of the two atria although it recieves the same amount of blood. The blood is then pumped through the tricuspid atrioventricular valve into the right ventricle. From the right ventricle, blood is pumped through the pulmonary semi-lunar valve into the pulmonary trunk. The deoxygenated blood leaves the heart by the pulmonary arteries and travels through the lungs (where it is oxygenated) and into the pulmonary veins. The oxygenated blood then enters the left atrium. The blood then travels through the bicuspid valve, also called mitral valve, into the left ventricle. The left ventricle is thicker and more muscular than the right ventricle because it pumps blood at a higher pressure. From the left ventricle, blood is pumped through the semi-lunar valve into the aorta. Once the blood goes through systemic circulation, deoxygenated blood will again collect inside the vena cava and the process will continue.
2006-08-24 03:05:04 · answer #1 · answered by J D 3 · 0⤊ 0⤋
It sends the blood through the body and to the brain. Coming out from the heart, it's full of nice, wonderful oxygen that the brain needs. Then, it comes back to the heart for a refill on the ol' oxy thing.
2006-08-24 03:04:30 · answer #2 · answered by KoKo 3 · 0⤊ 0⤋
The oxygen delivery, anti bodies, tissue repair, organ function.
Blood Flow is vital to every living tissue and organ in the human body. And yes your skin is an organ and a tissue.
2006-08-24 03:08:13 · answer #3 · answered by Anonymous · 0⤊ 0⤋
To carry oxygen and nutrients to all the parts and organs of the body. Now, get busy on your homework!
2006-08-24 02:59:40 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Plasma is the aqueous portion of the blood, the acellular portion in which the cellular portions are suspended and transported. It also contains electrolytes and substrates from digestion, such as glucose, fatty acids, and proteins. Hormones also are transported in this part of the blood. am damn sure about it you can surely take this
2016-03-27 03:35:54 · answer #5 · answered by Anonymous · 0⤊ 0⤋
To carry blood around the body.
2006-08-24 03:00:04 · answer #6 · answered by JeffE 6 · 0⤊ 0⤋
To move oxygenated blood to organs and tissues and return deoxygenated blood to the heart and lungs.
2006-08-24 03:03:35 · answer #7 · answered by Vanguard 3 · 0⤊ 0⤋
to carry nutrients to and waste products away from the various parts of the body
2006-08-24 03:01:02 · answer #8 · answered by Anonymous · 0⤊ 0⤋
transfers blood throughout the body
2006-08-24 02:59:36 · answer #9 · answered by CJ 2 · 0⤊ 0⤋