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Topic: Circulatory

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 Circulatory system -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-09)
All circulatory systems frequently employ (additional info and facts about countercurrent exchange) countercurrent exchange systems to drive the ((physics) the process of diffusing; the intermingling of molecules in gases and liquids as a result of random thermal agitation) diffusion of chemicals into or out of the bloodstream.
The human circulatory system is comprised of the (The fluid (red in vertebrates) that is pumped by the heart) blood, the vascular system, and the (The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body) heart.
After birth, the fetal circulatory system undergoes several anatomical changes, including closure of the (A blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth) ductus arteriosus and (additional info and facts about foramen ovale) foramen ovale.
www.absoluteastronomy.com /encyclopedia/c/ci/circulatory_system.htm   (1456 words)

 AllRefer.com - circulatory system (Anatomy And Physiology) - Encyclopedia
The circulatory system can be considered as composed of two parts: the systemic circulation, which serves the body as a whole except for the lungs, and the pulmonary circulation, which carries the blood to and from the lungs.
The organs of circulatory system consist of vessels that carry the blood and a muscular pump, the heart, that drives the blood.
Of the vessels, the arteries carry blood away from the heart; the main arterial vessel, the aorta, branches into smaller arteries, which in turn branch repeatedly into still smaller vessels and reach all parts of the body.
reference.allrefer.com /encyclopedia/C/circulat.html   (350 words)

 circulatory system --  Britannica Student Encyclopedia
The cardiovascular, or circulatory, system in humans is composed of the heart and the blood vessels—arteries, veins, and capillaries.
In tunicates and vertebrates the blood is propelled by a distinct heart; in cephalochordates, by contraction of the blood vessels.
Arthropods possess an open circulatory system consisting of a dorsal heart and a system of arteries that may be very limited (as in insects) or extensive (as in crabs).
www.britannica.com /ebi/article-9273674   (873 words)

 MedlinePlus Medical Encyclopedia: Vertebrobasilar circulatory disorders
Vertebrobasilar circulatory disorders is a group of disorders in which blood supply to the back of the brain is disrupted.
The prognosis is very poor when the patient is in coma or cannot move both arms and legs.
Complications of vertebrobasilar circulatory disorders are stroke and its complications.
www.nlm.nih.gov /medlineplus/ency/article/001423.htm   (1283 words)

 circulatory system. The Columbia Encyclopedia, Sixth Edition. 2001-05
In pulmonary circulation, the arteries carry oxygen-poor blood, and the veins bear oxygen-rich blood.
Disorders of the circulatory system generally result in diminished flow of blood and diminished oxygen exchange to the tissues.
Blood supply is also impeded in such conditions as arteriosclerosis and high blood pressure (see hypertension); low blood pressure resulting from injury (shock) is manifested by inadequate blood flow.
www.bartleby.com /65/ci/circulat.html   (741 words)

 circulatory system on Encyclopedia.com
Carried to converging vessels of increasing size, the lymph enters the thoracic duct and is emptied into a large vein near the heart.
Penn Researchers Discover Mutation in Mouse Circulatory Gene That Mimics a Form of Congenital Heart Disease.
Hospital readmission from home health care before and after prospective payment.(Health Policy and Systems)
www.encyclopedia.com /html/c1/circulat.asp   (626 words)

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