Blood consists of a liquid called plasma, red blood cells, white blood cells and platelets. Red bloods cells deliver oxygen from your lungs to your tissues and organs, white blood cells fight infection as part of your body's defense system, and platelets help blood clot when you experience a cut or wound. Blood is a constantly circulating fluid providing the body with nutrition, oxygen, and waste removal. Your blood group depends on which antigens occur on the surface of your red blood cells.
Updated: 20 hours 38 min ago
A red cell distribution width (RDW) blood test can help detect the presence of anemia, along with what could be causing it. The test identifies the size difference between the biggest and smallest red blood cells in a sample. In this article, we look at what to expect when having this test, and when it might be used.
Seeing blood in sputum or mucus can be worrying, but it is usually not a cause for concern. If a person is young or generally healthy, these traces of blood are often caused by a mild infection or bronchitis. In serious cases, they can indicate a severe infection or lung cancer. Learn about causes and treatments here.
Can the human body adapt to fit different environments? Sea nomad people from Southeast Asia testify to humans' versatility and endurance.
Congestive heart failure is a progressive disease that causes the heart to weaken, making it difficult to pump blood around the body. In this article, we look at the symptoms, stages, and life expectancy of congestive heart failure. We also look at treatment options, including lifestyle changes and surgery.
A variety of conditions and lifestyle factors can lead to a reduction in hemoglobin. Common causes include anemia, pregnancy, and thyroid conditions. One way to increase hemoglobin is to consume more iron and folate. Here, learn other ways to boost hemoglobin levels. We also describe normal ranges for men and women.
A wide range of factors influences blood pressure, including anxiety, stress, and medications. High blood pressure can have severe complications, such as a heart attack or stroke. A person can address fluctuating blood pressure with home remedies and lifestyle changes. Learn more about normalizing blood pressure here.
A doctor may use a number of tests to check whether someone is allergic to certain substances. These include skin tests and blood tests. Blood tests include RAST and ELISA tests. Learn more about the procedure and results of RAST tests, and how this allergy diagnosis test compares with skin tests.
Serum cholesterol is a measurement of high-density lipoprotein (HDL) cholesterol, which is considered good, low-density lipoprotein (LDL) cholesterol, which is considered bad, and triglycerides. A person's serum cholesterol level can help to determine whether they should change their diet or lifestyle. Learn more here.
A low anion gap from a blood test is usually nothing to worry about and often just a lab error. However, in some cases, it can indicate an underlying health condition. In this article, learn how an electrolyte test is used to calculate an anion gap, and what low and high anion gap results mean for someone’s health.
A volvulus occurs when part of the small or large intestine twists, causing a dangerous blockage. In this article, learn about the causes and symptoms in both adults and children, as well as how a volvulus is treated. We also look at what complications can occur, including sepsis, short bowel syndrome, and death.
A study shows that blood flow plays a key role in helping migrating cancer cells to exit the bloodstream and seed secondary tumors elsewhere in the body.
Plasmapheresis involves removing some plasma from the blood for donation. This plasma can be used to treat a range of medical conditions, including myeloma and some issues affecting the kidneys, the brain, or the nervous system. Here, learn how plasmapheresis works, what to expect, and how to prepare.
Some people believe that blood is blue when it is in the body and only turns red when it interacts with oxygen in the air. In this article, we investigate this and other myths and facts about the blood. Which animals have blue blood? How much blood is in the human body? Why is blood red? Find out all this and more.
A person’s blood pressure is measured by the balance between diastolic and systolic pressure in the heart. The current guidelines say that a normal range is under 120/80 mm Hg. Here, we discuss the difference between diastole and systole and the risks of hypertension (high) and hypotension (low) blood pressure.
Broken blood vessels or spider veins are enlarged blood vessels under the skin. They can occur anywhere but can appear on the face for a variety of reasons, including alcohol consumption and vomiting. In this article, learn how to get rid of broken blood vessels on the face with clinical treatments and home remedies.
Leech therapy has been around since the dawn of civilization, and it is still practiced today. I gave it a try and here's what it felt like.