News tagged with bloodstream
New technology to tackle treatment-resistant cancers
Free-flowing cancer cells have been mapped with unprecedented accuracy in the bloodstream of patients with prostate, breast and pancreatic cancer, using a brand new approach, in an attempt to assess and control the disease ...
Feb 03, 2012 |
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Scientists illuminate cancer cells' survival strategy
A team led by scientists at The Scripps Research Institute has discovered key elements of a strategy commonly used by tumor cells to survive when they spread to distant organs. The finding could lead to drugs that could inhibit ...
Jan 26, 2012 |
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A leukemia drug kills cancerous T-cells while sparing normal immunity
Leukemic cutaneous T-cell lymphoma (L-CTCL) is a leukemia arising from T-cells, a type of white blood cell. This cancer can involve the skin and other organs, and patients often die within three years.
Jan 25, 2012 |
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High levels of MRSA bacteria in retail meat products
Retail pork products in the U.S. have a higher prevalence of methicillin-resistant Staphylococcus aureus bacteria (MRSA) than previously identified, according to new research by the University of Iowa College of Public Health ...
Jan 20, 2012 |
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Saturated fatty acids lead to mitochondrial dysfunction and insulin resistance
Excessive levels of certain saturated fatty acids cause mitochondria to fragment, leading to insulin resistance in skeletal muscle, a precursor of type 2 diabetes, according to a paper in the January issue of the journal ...
Jan 20, 2012 |
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How immune cells move against invaders
UCSF scientists have discovered the unexpected way in which a key cell of the immune system prepares for battle. The finding, they said, offers insight into the processes that take place within these cells and could lead ...
Jan 19, 2012 |
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Chemists unlock potential target for drug development
A receptor found on blood platelets whose importance as a potential pharmaceutical target has long been questioned may in fact be fruitful in drug testing, according to new research from Michigan State University ...
Chemistry / Analytical Chemistry
Jan 19, 2012 |
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Late-stage sepsis suppresses immune system
(Medical Xpress) -- Patients who die from sepsis are likely to have had suppressed immune systems that left them unable to fight infections, researchers at Washington University School of Medicine in St. Louis ...
Jan 11, 2012 |
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Take two robots and call me in the morning
In the 1966 film "Fantastic Voyage," medical personnel board a submarine that shrinks to microscopic size and enters the bloodstream of a wounded diplomat to save his life.
Jan 06, 2012 |
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JAMA commentary contends vitamin therapy can still reduce stroke
A commentary by Dr. David Spence of The University of Western Ontario and Dr. Meir Stampfer of the Harvard School of Public Health in today's Journal of the American Medical Association (JAMA) argues that vitamin therapy still ...
Dec 21, 2011 |
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New candidate vaccine neutralizes all tested strains of malaria parasite
A new candidate malaria vaccine with the potential to neutralise all strains of the most deadly species of malaria parasite has been developed by a team led by scientists at the University of Oxford. The results of this new ...
Dec 20, 2011 |
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Scientists solve ricin riddle using new technology
A protein that controls how the deadly plant poison and bioweapon ricin kills has finally been identified by a team of Austrian researchers in a new study. With a combination of stem cell biology and modern ...
Dec 20, 2011 |
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New system may one day steer microrobots through blood vessels for disease treatment
Researchers use a magnetic field to generate both side-to-side and corkscrew-like motions of tiny robots.
Dec 16, 2011 |
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Understanding how cancer spreads: Nanotech single-cell monitoring technique could give insights
(PhysOrg.com) -- A technique that lets researchers monitor single cancer cells in real time as they float in liquid could help doctors study the breakaway tumor cells that cause metastasis. Metastasis is the ...
Nanotechnology / Bio & Medicine
Dec 15, 2011 |
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Researchers use new finding to clear bloodstream malaria infection in mice
University of Iowa researchers and colleagues have discovered how malaria manipulates the immune system to allow the parasite to persist in the bloodstream. By rescuing this immune system pathway, the research team was able ...
Dec 12, 2011 |
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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.
