Category: H

  • Haemorrhoids, Hemorrhoids

    A painful condition in which the veins around the anus or lower rectum are enlarged, swollen and inflamed. Also called piles. An enlarged and often dilated blood vessel or vein of the anal canal or the lower portion of the alimentary tract. Piles, anal varicose veins. Enlarged veins (varicose veins) in the lower portion of…

  • Haemorrhage, hemaorrhage

    Bleeding, profuse discharge of blood from blood vessels. The loss of a large quantity of blood, especially from a burst blood vessel. The escape of blood from a blood vessel, normally in response to some trauma, or as a result of a clotting disorder such as haemophilia. The bleeding may be external and follow, for…

  • Haemoptysis, hemoptysis

    Is the coughing up of blood from the respiratory tract. The blood can come from the nose, mouth, throat, the airway passages leading to the lungs. Coughing up of blood from the airways. Spitting of blood from the lungs. Coughing and spitting up of blood due to bleeding in any portion of the respiratory tract.…

  • Haemolyis

    Lysis of red blood cells and the release of haemoglobin into the surrounding fluid (plasma). adj. haemolytic.  

  • Haemodialysis, Hemodialysis

    A method for removing waste products such as potassium and urea, as well as free water from the blood when the kidneys are in renal failure. A kidney machine that purifies a person’s blood when the kidneys fail. Process of removing toxic substances from blood with the aid of a synthetic semipermeable membrane. A form…

  • Haemochromatosis

    Is a condition in which the body takes in too much iron. Iron overload; excessive absorption and storage of iron in the body, commonly the result of a genetic defect. In most cases it is caused by a recessive gene i.e. it can only be passed on if both parents are carriers of the gene…

  • Haeme oxygenase

    (HO-1, encoded by Hmox1) is an inducible protein activated in systemic inflammatory conditions by oxidant stress, an enzyme that catalyzes degradation of heme. An enzyme that cleaves the ring structure of heme, releasing biliverdin, carbon monoxide, and iron. It is present in humans in two active forms: HO-1 and HO-2.  

  • Haematuria, Hematuria

    Is the presence of blood in the urine. Hematuria is a sign that something is causing abnormal bleeding in a person’s genitourinary tract. The finding of blood in the urine. The presence of blood in the urine, often a symptom of disease in the urinary tract. A medical condition involving red blood cells in the…

  • Haematopoietic (adj)

    Relating to the formation and development of blood cells.  

  • Haematopoiesis, hematopoiesis

    Formation of blood cellular components from the haematopoietic stem cells. Pertaining to the production and the development of blood cells or a substance that stimulates their production. The production of various types of blood cells and platelets hemopoiesis. Process by which blood cells are produced, esp. as occurring in the bone marrow; also called hemopoiesis.…