News tagged with blood circulation
Australia: Stroke rates decline, but many still preventable
The rate of strokes suffered by Australians has dropped over the past 20 years, while strokes caused by an irregular heartbeat now account for one third of all strokes, according to new research led by the University of Adelaide.
Cardiology
May 16, 2013 |
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Metastasis stem cells in the blood of breast cancer patients discovered
Individual cancer cells that break away from the original tumor and circulate through the blood stream are considered responsible for the development of metastases. These dreaded secondary tumors are the ...
Cancer
Apr 22, 2013 |
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Multiple sclerosis is remote controlled
(Medical Xpress)—Autoimmune diseases are triggered by immune cells that attack the body's own tissue. In multiple sclerosis (MS) immune cells succeed in invading nervous tissue and sparking off a destructive inflammation ...
Immunology
Sep 11, 2012 |
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Human 'shock absorbers' discovered
(Medical Xpress) -- An international team of scientists, led by the University of Sydney, has found the molecular structure in the body which functions as our 'shock absorber'.
Medical research
Feb 14, 2012 |
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At least one in five were infected in flu pandemic, international study suggests
(Medical Xpress)—At least one in five people in countries for which data are available were infected with influenza during the first year of the 2009 H1N1 pandemic, according to a new study.
Diseases, Conditions, Syndromes
Jan 25, 2013 |
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Scientists unlock evolutionary secret of blood vessels
The ability to form closed systems of blood vessels is one of the hallmarks of vertebrate development. Without it, humans would be closer to invertebrates (think mollusks) in design, where blood simply washes through an open ...
Medical research
Feb 21, 2012 |
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New study confirms immune cells are guided by gradients
(Medical Xpress)—A group of researchers in Austria and Switzerland has for the first time proven that immune cells migrate along chemical concentration gradients. This process has long been assumed but ...
Immunology
Jan 18, 2013 |
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Jellyfish inspire scientists to invent a device that can detect, capture and release rare cancer cells
Tumor cells circulating in a patient's bloodstream can yield a great deal of information on how a tumor is responding to treatment and what drugs might be more effective against it. But first, these rare ...
Cancer
Nov 12, 2012 |
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Protein impedes microcirculation of malaria-infected red blood cells
(Medical Xpress)—When the parasite responsible for malaria infects human red blood cells, it launches a 48-hour remodeling of the host cells. During the first 24 hours of this cycle, a protein called RESA undertakes the ...
Medical research
Aug 30, 2012 |
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New options for ease and accuracy in extraction of rare cells or separating blood
(Medical Xpress)—Using something called "inertial microfluidics," University of Cincinnati researchers are able to continuously and selectively collect rare cells, such as circulating tumor cells, based ...
Cancer
Oct 26, 2012 |
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Bioengineered protein shows preliminary promise as new therapy for hemophilia
A genetically engineered clotting factor that controlled hemophilia in an animal study offers a novel potential treatment for human hemophilia and a broad range of other bleeding problems.
Genetics
Oct 23, 2011 |
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Scientists demonstrate effective new 'biopsy in a blood test' to detect cancer
Scientists from The Scripps Research Institute, Scripps Health, and collaborating cancer physicians have successfully demonstrated the effectiveness of an advanced blood test for detecting and analyzing circulating ...
Cancer
Feb 02, 2012 |
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Detecting circulating tumor cells
A proof-of-concept device is nearly perfect in separating breast cancer cells from blood.
Cancer
Mar 25, 2013 |
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Diabetes distresses bone marrow stem cells by damaging their microenvironment
New research has shown the presence of a disease affecting small blood vessels, known as microangiopathy, in the bone marrow of diabetic patients. While it is well known that microangiopathy is the cause of renal damage, ...
Diabetes
Jan 31, 2013 |
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Smoking, high blood pressure and cholesterol can be fatal for haemorrhage survivors, study finds
A Finnish study shows that patients who have experienced subarachnoid haemorrhage (SAH) have a highly increased risk of death due to a stroke or cerebral haemorrhage, and have double the mortality rate of the general population. ...
Neuroscience
Jan 14, 2013 |
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Circulatory system
The circulatory system is an organ system that passes nutrients (such as amino acids and electrolytes), gases, hormones, blood cells, nitrogen waste products, etc. to and from cells in the body to help fight diseases and help stabilize body temperature and pH to maintain homeostasis. This system may be seen strictly as a blood distribution network, but some consider the circulatory system as composed of the cardiovascular system, which distributes blood, and the lymphatic system, which distributes lymph. While humans, as well as other vertebrates, have a closed cardiovascular system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open cardiovascular system. The most primitive animal phyla lack circulatory system. The lymphatic system, on the other hand, is an open system.
The main components of the human circulatory system are the heart, the blood, and the blood vessels. The circulatory system includes: the pulmonary circulation, a "loop" through the lungs where blood is oxygenated; and the systemic circulation, a "loop" through the rest of the body to provide oxygenated blood. An average adult contains five to six quarts (roughly 4.7 to 5.7 liters) of blood, which consists of plasma, red blood cells, white blood cells, and platelets. Also, the digestive system works with the circulatory system to provide the nutrients the system needs to keep the heart pumping.
Two types of fluids move through the circulatory system: blood and lymph. The blood, heart, and blood vessels form the cardiovascular system. The lymph, lymph nodes, and lymph vessels form the lymphatic system. The cardiovascular system and the lymphatic system collectively make up the circulatory system.
For more information about Circulatory system, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
