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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Drug-coated stents prevent leg amputation
Drug-eluting stents can keep clogged leg arteries open, preventing amputation of the leg, suggests research being presented at the Society of Interventional Radiology's 38th Annual Scientific Meeting in New Orleans.
Cardiology
Apr 14, 2013 |
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Doctoral dissertation studies the use of light in measuring cerebral circulation
Tiina Näsi, a researcher of biomedical engineering at Aalto University, studied in her doctoral thesis the use of light in measuring the brain's blood circulation. This optical measurement may in the future help discover ...
Medical research
Apr 12, 2013 |
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Third-generation device significantly improves capture of circulating tumor cells
A new system for isolating rare circulating tumor cells (CTCs) – living solid tumor cells found at low levels in the bloodstream – shows significant improvement over previously developed devices and does ...
Cancer
Apr 03, 2013 |
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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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First 'breathing lung' transplant on East Coast using OCS lung
UPMC surgeons have performed a "breathing lung" transplant using a portable machine that provides a constant supply of blood and nutrients to the donor organs, which doctors say has the potential to keep them healthier and ...
Other
Mar 14, 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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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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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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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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Computer simulations of blood flow through mechanical heart valves could pave the way for more individualized prosthetic
Every year, over 300,000 heart valve replacement operations are performed worldwide. Diseased valves are often replaced with mechanical heart valves (MHVs), which cannot yet be designed to suit each patient's ...
Cardiology
Dec 19, 2012 |
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Researchers demonstrate that saliva analysis can reveal decision-making skills
A study conducted by researchers at the University of Granada Group of Neuropsychology and Clinical Psychoneuroimmunology has demonstrated that cortisol levels in saliva are associated with a person's ability to make good ...
Psychology & Psychiatry
Dec 10, 2012 |
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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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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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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.
