Wearable sensors detect what's in your sweat
Needle pricks not your thing? A team of scientists at the University of California, Berkeley, is developing wearable skin sensors that can detect what's in your sweat.
Aug 16, 2019
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277
Engineering
Needle pricks not your thing? A team of scientists at the University of California, Berkeley, is developing wearable skin sensors that can detect what's in your sweat.
Aug 16, 2019
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277
Consumer & Gadgets
Many smartwatches and other digital fitness trackers have a function for measuring heart rate. However, a recent report from Stat News suggests that these heart-rate monitors may not be all that accurate for people of colour ...
Aug 2, 2019
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1
Machine learning & AI
Machine learning techniques can better predict bleeding risk for patients undergoing percutaneous coronary intervention (PCI) than traditional methods, report Yale researchers.
Jul 23, 2019
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23
Robotics
Untethered robots suffer from a stamina problem. A possible solution: a circulating liquid—"robot blood"—to store energy and power its applications for sophisticated, long-duration tasks.
Jun 20, 2019
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0
Engineering
With the growth of 3-D printing, it's entirely possible to 3-D print your own prosthetic from models found in open-source databases.
Apr 4, 2019
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177
Engineering
Devising the best treatment for a patient with cancer requires doctors to know something about the traits of the cancer from which the patient is suffering. But one of the greatest difficulties in treating cancer is that ...
Apr 2, 2019
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74
Engineering
If you've ever dreamed about getting a good night's sleep, your answer may someday lie in data generated by your sleepwear. Researchers have developed pajamas embedded with self-powered sensors that provide unobtrusive and ...
Apr 1, 2019
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50
Consumer & Gadgets
A huge study suggests the Apple Watch can detect a worrisome irregular heartbeat at least sometimes—but experts say more work is needed to tell if using wearable technology to screen for heart problems really helps.
Mar 16, 2019
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34
Engineering
Every day our kidneys tackle the daunting task of continuously cleaning our blood to prevent waste, salt and excess fluid from building up inside our bodies. To achieve this, the kidneys' approximately one million filtration ...
Mar 4, 2019
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42
Engineering
An interdisciplinary Northwestern University team has developed a pair of soft, flexible wireless sensors that replace the tangle of wire-based sensors that currently monitor babies in hospitals' neonatal intensive care units ...
Feb 28, 2019
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2531
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