Advances in emergency medicine and trauma surgery have had a significant impact on survival of patients in the days immediately after major injuries, including burns. Patients who survive the immediate aftermath of their ...
not rated yet |
0
|
(HealthDay)—In an effort to focus greater attention on the weight-gain epidemic plaguing the United States, the American Medical Association has now classified obesity as a disease.
not rated yet |
0
|
Men who lose sleep during the work week may be able to lower their risk of developing Type 2 diabetes by getting more hours of sleep, according to Los Angeles Biomedical Research Institute (LA BioMed) research findings presented ...
not rated yet |
0
|
(Medical Xpress)—University of Leicester scientists have discovered a potential genetic contributor to the increased risk of heart disease among men.
not rated yet |
0
|
By the time 10-year-old Sarah Murnaghan finally got a lung transplant last week, she'd been waiting for months, and her parents had sued to give her a better chance at surgery. Her cystic fibrosis was threatening ...
5 / 5 (4) |
0
Harvard Stem Cell Institute (HSCI) researchers have identified in the most aggressive forms of cancer a gene known to regulate embryonic stem cell self-renewal, beginning a creative search for a drug that can block its activity.
5 / 5 (1) |
0
|
A team from the New York Stem Cell Foundation (NYSCF) Research Institute and the Naomi Berrie Diabetes Center of Columbia University has generated patient-specific beta cells, or insulin-producing cells, that accurately reflect ...
5 / 5 (3) |
0
|
A new study shows that memory pathology in older mice with Alzheimer's disease can be reversed with treatment. The study by researchers from the Montreal Neurological Institute and Hospital - The Neuro, at McGill University ...
5 / 5 (3) |
0
|
(Medical Xpress)—A team of Canadian researchers has found that platelets in mice liver collaborate with special types of white blood cells to help capture bacteria. In their paper published in the journal ...
5 / 5 (1) |
0
|
A University of Calgary researcher has identified how a steroid hormone may indicate infant distress during labour and delivery. The study, published by PLOS ONE this month, suggests that a full-term, healthy baby prefer ...
not rated yet |
0
|
(Medical Xpress)—Yale researchers eradicated most melanoma tumors by exposing them to a fast-acting virus, they report in the June 15 edition of the Journal of Virology.
5 / 5 (7) |
0
|
Too much sugar can set people down a pathway to heart failure, according to a study led by researchers at The University of Texas Health Science Center at Houston (UTHealth).
4.7 / 5 (3) |
0
|
By transferring four genes into mouse fibroblast cells, researchers at the Icahn School of Medicine at Mount Sinai have produced cells that resemble hematopoietic stem cells, which produce millions of new blood cells in the ...
5 / 5 (1) |
0
|
Arthritis is a debilitating disorder affecting one in 10 Canadians, with pain caused by inflammation and damage to joints.
not rated yet |
0
|
Researchers at Case Western Reserve University have found that a single gene poses a double threat to disease: Not only does it inhibit the growth and spread of breast tumors, but it also makes hearts healthier.
5 / 5 (3) |
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.
This text uses material from Wikipedia licensed under CC BY-SA
