News tagged with blood supply
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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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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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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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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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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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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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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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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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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Gold nanoparticles bring scientists closer to a treatment for cancer
Scientists at the University of Southampton have developed smart nanomaterials, which can disrupt the blood supply to cancerous tumours.
Nanotechnology / Bio & Medicine
Jul 07, 2011 |
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First newborn receives xenon gas in bid to prevent brain injury
(PhysOrg.com) -- In a world first, xenon gas has been successfully delivered to a newborn baby in a bid to prevent brain injury following a lack of oxygen at birth. This pioneering technique was developed ...
Medicine & Health / Medical research
Apr 12, 2010 |
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Shelve routine use of costly silver wound dressings, says DTB
Urologists are failing to pick up and treat Chlamydia infection in young men, say UK researchers in a letter published ahead of print in the journal Sexually Transmitted Infections.
Medicine & Health / Diseases, Conditions, Syndromes
Apr 15, 2010 |
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Limited data suggest possible association between Agent Orange exposure
A new report from the Institute of Medicine finds suggestive but limited evidence that exposure to Agent Orange and other herbicides used during the Vietnam War is associated with an increased chance of developing ischemic ...
Medicine & Health / Diseases, Conditions, Syndromes
Jul 24, 2009 |
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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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New study provides insight into ways organ systems outside the brain may affect Alzheimer's disease
In Alzheimer's disease the brain accumulates a molecule called A-beta that can be quite toxic to brain cells. Many researchers believe that finding ways to clear A-beta may be a key to treatment or prevention of Alzheimer's ...
Medicine & Health / Diseases, Conditions, Syndromes
Feb 16, 2009 |
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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.
