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.
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Researchers have been developing a 'universal' blood test that can quickly detect the presence of cancer. The scientists are now working to improve it.
Doctors do not usually consider ulcerative colitis (UC) to be a life-threatening condition, but it may increase a person’s risk of some serious complications. Learn more here.
There are many explanations for why a person may have swollen feet. Some causes, such as a twisted or sprained ankle, are obvious. Others might be less apparent but need urgent medical attention. These include a blood clot in the leg, heart failure, and preeclampsia. Find out when to see a doctor for swollen feet here.
Estradiol is a form of the hormone estrogen, which plays a role in many aspects of growth and development. Doctors can measure estradiol levels with a blood test and may request one if they suspect any problems with sexual development or fertility. Learn more about the test's uses here, and what the results may mean.