News tagged with blood stream
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 | 5 / 5 (3) | 0 |
(Medical Xpress)—NC State professor of veterinary internal medicine Ed Breitschwerdt has spent the last couple of decades working with Bartonella, bacteria historically associated with "cat scratch disease." ...
Diseases, Conditions, Syndromes Apr 24, 2013 | 4.7 / 5 (3) | 0
(Medical Xpress)—University of Nottingham Malaria experts have found a way of disabling one of the many phosphatase proteins which breathe life into the malaria parasite. The result is a mutant which is ...
Diseases, Conditions, Syndromes Sep 21, 2012 | 4.5 / 5 (4) | 0 |
(Medical Xpress)—Work by Michigan Technological University biologist Xiaoqing Tang is yielding new insights into how a tiny snippet of genetic material can promote healthy insulin production in mice.
Medical research Sep 20, 2012 | 5 / 5 (2) | 0 |
(Medical Xpress)—A team of researchers at Indiana University's School of Medicine has found that giving meloxicam, a non-steroidal anti-inflammatory drug (NSAID), to people and baboons boosts the number of haematopoietic ...
Medical research Mar 14, 2013 | not rated yet | 0 |
Recent work in mice suggested that the immune system is involved in removing beta-amyloid, the main Alzheimer's-causing substance in the brain. Researchers have now shown for the first time that this may apply in humans.
Alzheimer's disease & dementia May 25, 2012 | 4.5 / 5 (6) | 0 |
(Medical Xpress)—Research led by Queen Mary, University of London, has opened up the possibility that drug therapies may one day be able to restore the integrity of the blood-brain barrier, potentially ...
Medical research Jan 02, 2013 | 5 / 5 (6) | 1 |
(Medical Xpress) -- Murmurings over the past couple of years suggesting that certain statins might reduce the risk for people developing skin cancer, have proven to be unfounded. New research by a team working out of the ...
Cancer Apr 23, 2012 | 5 / 5 (3) | 0 |
The healthy human intestine is colonized with over 100 trillion beneficial, or commensal, bacteria of many different species. In healthy people, these bacteria are limited to the intestinal tissues and have ...
Medical research Jun 06, 2012 | 5 / 5 (2) | 1 |
Antibodies developed by researchers at Rensselaer Polytechnic Institute are unusually effective at preventing the formation of toxic protein particles linked to Alzheimer's disease and Parkinson's disease, ...
Neuroscience Dec 03, 2012 | 4 / 5 (2) | 1 |
A study from scientists at Queen Mary, University of London, sheds new light on why people who experience serious trauma or go through major surgery, can suffer organ damage in parts of the body which are seemingly unconnected ...
Medical research Jun 26, 2011 | not rated yet | 0 |
(Medical Xpress) -- Caffeinated drinks such as coffee and soda are the pick-me-ups of choice for many people, but too much caffeine can cause nervousness and sleep problems.
Health Feb 14, 2012 | not rated yet | 0 |
Genetic regulation of metabolomic biomarkers -- paths to cardiovascular diseases and type 2 diabetes
In a study to the genetic variance of human metabolism, researchers have identified thirty one regions of the genome that were associated with levels of circulating metabolites, i.e., small molecules that ...
Diabetes Jan 29, 2012 | not rated yet | 0
Vienna, Austria: Children who are exposed to polychlorinated biphenyls (PCBs), which were commonly used in a range of industrial products, could be at risk of an increase in asthma symptoms, according to new research.
Immunology Sep 01, 2012 | not rated yet | 0
New data from clinical studies presented for the first time at the International Liver Congress 2013 provide new rationale for an old and established treatment option for portal hypertension. Additionally, spleen stiffness ...
Diseases, Conditions, Syndromes Apr 25, 2013 | not rated yet | 0
Blood is a specialized bodily fluid that delivers necessary substances to the body's cells — such as nutrients and oxygen — and transports waste products away from those same cells.
In vertebrates, it is composed of blood cells suspended in a liquid called blood plasma. Plasma, which comprises 55% of blood fluid, is mostly water (90% by volume), and contains dissolved proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), platelets and blood cells themselves. The blood cells present in blood are mainly red blood cells (also called RBCs or erythrocytes) and white blood cells, including leukocytes and platelets. The most abundant cells in vertebrate blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates transportation of oxygen by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is almost entirely transported extracellularly dissolved in plasma as bicarbonate ion.
Vertebrate blood is bright-red when its hemoglobin is oxygenated. Some animals, such as crustaceans and mollusks, use hemocyanin to carry oxygen, instead of hemoglobin. Insects and some molluscs use a fluid called hemolymph instead of blood, the difference being that hemolymph is not contained in a closed circulatory system. In most insects, this "blood" does not contain oxygen-carrying molecules such as hemoglobin because their bodies are small enough for their tracheal system to suffice for supplying oxygen.
Jawed vertebrates have an adaptive immune system, based largely on white blood cells. White blood cells help to resist infections and parasites. Platelets are important in the clotting of blood. Arthropods, using hemolymph, have hemocytes as part of their immune system.
Blood is circulated around the body through blood vessels by the pumping action of the heart. In animals having lungs, arterial blood carries oxygen from inhaled air to the tissues of the body, and venous blood carries carbon dioxide, a waste product of metabolism produced by cells, from the tissues to the lungs to be exhaled.
Medical terms related to blood often begin with hemo- or hemato- (also spelled haemo- and haemato-) from the Ancient Greek word αἶμα (haima) for "blood". In terms of anatomy and histology, blood is considered a specialized form of connective tissue, given its origin in the bones and the presence of potential molecular fibers in the form of fibrinogen.
For more information about Blood, read the full article at
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