News tagged with bloodstream
Removable 'cloak' for nanoparticles helps them target tumors
MIT chemical engineers have designed a new type of drug-delivery nanoparticle that exploits a trait shared by almost all tumors: They are more acidic than healthy tissues.
Nanotechnology / Bio & Medicine
May 02, 2011 |
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Multifunctional nanoparticle enables new type of biological imaging
Spotting a single cancerous cell that has broken free from a tumor and is traveling through the bloodstream to colonize a new organ might seem like finding a needle in a haystack. But a new imaging technique ...
Nanotechnology / Bio & Medicine
Jul 27, 2010 |
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Scientists discover promising new path for treating traumas
(PhysOrg.com) -- A discovery by scientists at the Oklahoma Medical Research Foundation could help save lives threatened by traumatic injuries like those sustained in car crashes or on the battlefield. The ...
Medicine & Health / Medical research
Oct 25, 2009 |
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Silver nanoparticles show 'immense potential' in prevention of blood clots
Scientists are reporting discovery of a potential new alternative to aspirin, ReoPro, and other anti-platelet agents used widely to prevent blood clots in coronary artery disease, heart attack and stroke. ...
Nanotechnology / Bio & Medicine
May 27, 2009 |
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Cellphones may spread superbugs in hospitals: study
Cell phones belonging to hospital staff were found to be tainted with bacteria -- including the drug-resistant MRSA superbug -- and may be a source of hospital-acquired infections, according to study released Friday.
Mar 06, 2009 |
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Microbot motors fit to swim human arteries (Video)
(PhysOrg.com) -- A range of complex surgical operations necessary to treat stroke victims, confront hardened arteries or address blockages in the bloodstream are about to be made safer as researchers from ...
Jan 20, 2009 |
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Some scum! Microbe in pond scum enlisted in new cancer test
Scientists are enlisting the living, self-propelled microbes found in pond scum -- the pea-green surface slicks that form on ponds -- in the development of a long-awaited new test to detect the cells that spread cancer through ...
Mar 25, 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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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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'Label-free' imaging tool tracks nanotubes in cells, blood for biomedical research
(PhysOrg.com) -- Researchers have demonstrated a new imaging tool for tracking structures called carbon nanotubes in living cells and the bloodstream, which could aid efforts to perfect their use in biomedical ...
Nanotechnology / Bio & Medicine
Dec 05, 2011 |
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Drug boosts snakebite survival time by half: study
Rubbing snakebites with an ointment that slows the functioning of lymph glands could boost survival times by 50 percent, according to a study released Sunday.
Medicine & Health / Medications
Jun 26, 2011 |
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Experts: Store blood cells from Japan nuke workers
Workers at Japan's troubled nuclear plant should store blood cells now in case they need them later as treatment for radiation overdose, some Japanese experts suggest.
Apr 15, 2011 |
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Detecting whether a heart attack has occurred
During about 30 percent of all heart attacks, the patient experiences no symptoms. However, unmistakable signs of the attack remain in the bloodstream for days. MIT researchers, working with Massachusetts ...
Feb 14, 2011 |
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Tumor microvesicles reveal detailed genetic information
The Massachusetts General Hospital (MGH) research team that first discovered tumor-associated RNA in tiny membrane-enclosed sacs released into the bloodstream by cancer cells has now found that these microvesicles also contain ...
Feb 10, 2011 |
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Stem cell discovery could lead to improved bone marrow transplants
Researchers at the University of California, Santa Cruz, have identified a key molecule for establishing blood stem cells in their niche within the bone marrow. The findings, reported in the January issue of Cell Stem Ce ...
Jan 06, 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.
