News tagged with blood supply
Simple injection could limit damage from heart attacks and stroke
(PhysOrg.com) -- This weeks Early Edition of the Proceedings of the National Academy of Sciences (PNAS) will publish a fascinating new milestone achievement in the search for novel clinical therapies to significantly reduce the lo ...
Medicine & Health / Cardiology
Apr 18, 2011 |
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Fluorescent peptides help nerves glow in surgery
Accidental damage to thin or buried nerves during surgery can have severe consequences, from chronic pain to permanent paralysis. Scientists at the University of California, San Diego School of Medicine may have found a remedy: ...
Feb 06, 2011 |
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Cutting off the oxygen supply to serious diseases
A new family of proteins which regulate the human body's 'hypoxic response' to low levels of oxygen has been discovered by scientists at Barts Cancer Institute at Queen Mary, University of London and The University of Nottingham.
Jan 30, 2012 |
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Blood progenitor cells receive signals from niche cells and the daughter blood cells they create
Maintaining balance is crucial. In Drosophila, the common fruit fly, the creation and maintenance of the blood supply requires such balance.
Dec 22, 2011 |
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Immune interaction optimises foetal nourishment during pregnancy
(PhysOrg.com) -- Paternal genes advise maternal immune cells on how to build the best womb for developing foetuses.
Medicine & Health / Medical research
Feb 08, 2011 |
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Scientists make cancer breakthrough in the way anti-cancer drugs are tested
Scientists at the University of East Anglia have made an important breakthrough in the way anti-cancer drugs are tested.
Oct 14, 2010 |
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Watercress may 'turn off' breast cancer signal
The research, unveiled at a press conference today (14 September 2010), shows that the watercress compound is able to interfere with the function of a protein which plays a critical role in cancer development.
Sep 14, 2010 |
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Study pinpoints new role of molecule in the health of body's back-up blood circulation
When the arteries delivering oxygen to our vital organs are obstructed by atherosclerosis or clots, the result is almost always a stroke, heart attack or damage to a peripheral tissue such as the legs (peripheral ...
Medicine & Health / Medical research
May 26, 2010 |
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How dark chocolate may guard against brain injury from stroke
Researchers at Johns Hopkins have discovered that a compound in dark chocolate may protect the brain after a stroke by increasing cellular signals already known to shield nerve cells from damage.
May 05, 2010 |
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How red wine may shield brain from stroke damage
Researchers at Johns Hopkins say they have discovered the way in which red wine consumption may protect the brain from damage following a stroke.
Medicine & Health / Neuroscience
Apr 21, 2010 |
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Brain surgery evolves to destroy rogue blood vessels
(PhysOrg.com) -- Over three decades, a world-recognized medical team at UC San Diego Medical Center has spurred the evolution of a complex surgery to destroy dangerous clusters of arteries and veins in the brain. Integrating ...
Medicine & Health / Medical research
Dec 16, 2009 |
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Sight gone, but not necessarily lost? Researchers find life in blood-starved retinas
Like all tissues in the body, the eye needs a healthy blood supply to function properly. Poorly developed blood vessels can lead to visual impairment or even blindness. While many of the molecules involved in guiding the ...
Oct 30, 2009 |
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Muscle: 'Hard to build, easy to lose' as you age
(PhysOrg.com) -- Have you ever noticed that people have thinner arms and legs as they get older? As we age it becomes harder to keep our muscles healthy. They get smaller, which decreases strength and increases the likelihood ...
Medicine & Health / Medical research
Sep 11, 2009 |
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Human stem cells promote healing of diabetic ulcers
(PhysOrg.com) -- Treatment of chronic wounds is a continuing clinical problem and socio-economic burden with diabetic foot ulcers alone costing the NHS £300 million a year. Scientists in Bristol have found ...
Medicine & Health / Medical research
Apr 20, 2009 |
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Reprogramming stem cells to a more basic form results in more effective transplant, study shows
Chinese stem cell scientists have published new research that improves the survival and effectiveness of transplanted stem cells. The research led by Dr Hsiao Chang Chan, from the Chinese University of Hong Kong, is published ...
Nov 03, 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.
