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Glossary |
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Glossary - H |
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Hair follicle
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Hair follicle- a tiny opening in the skin from which a hair grows
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Halitosis
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Halitosis- the clinical term for bad breath; commonly caused by poor oral hygiene or eating certain foods; if persistent it can be a sign of illness
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Hallucination
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Hallucination- a perception that occurs when there is actually nothing to cause it (such as hearing voices when there are none)
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Hammer toe
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Hammer toe- an abnormality in the tendons of the toe that causes the toe to be flexed at all times
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Hashimoto’s disease
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Hashimoto’s disease- a disease in which the body’s immune system attacks cells of the thyroid gland, resulting in a decrease in thyroid hormones
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Hay fever
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Hay fever- the common name for allergic rhinitis
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Heart
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Heart-lung machine- a machine that takes over the functions of the heart and lungs during certain types of surgery
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Heart block
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Heart block- a disorder of the heart caused by a blockage of the nerve impulses to the heart that regulate heartbeat; may lead to dizziness, fainting, or stroke
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Heart failure
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Heart failure- the inability of the heart to pump blood effectively
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Heartburn
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Heartburn- a burning sensation experienced in the center of the chest up to the throat; may be caused by overeating, eating spicy food, or drinking alcohol; recurrent heartburn may be caused by acid reflux
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Heat stroke
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Heat stroke- a life-threatening condition resulting from extreme overexposure to heat, which disrupts the body's system of regulating temperature
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Heel spur
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Heel spur- an abnormal, often painful outgrowth of bone on the back of the heel
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Hematocrit
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Hematocrit- the percentage of total blood volume that consists of red blood cells, which is determined by laboratory testing; can be an indicator of disease or injury
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Hematuria
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Hematuria- blood in the urine, which can be caused by urinary tract disorders (such as cysts, tumor, or stones) or by an infection
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Hemochromatosis
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Hemochromatosis- a genetic disorder in which too much iron is absorbed from food
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Hemodialysis
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Hemodialysis- A mechanical method of cleaning the blood for people who have kidney disease. See also: Dialysis.
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Hemodialysis
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Hemodialysis- a method used to treat kidney failure, in which blood is passed through a machine that purifies it and returns it to the body
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Hemoglobin
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Hemoglobin- the pigment in red blood cells that is responsible for carrying oxygen; hemoglobin bound to oxygen gives blood its red color
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Hemoglobin A1C (HbA1c)
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Hemoglobin A1C (HbA1c)- The substance of red blood cells that carries oxygen to the cells and sometimes joins with glucose (sugar). Because the glucose stays attached for the life of the cell (about 4 months), a test to measure hemoglobin A1C shows what the person’s average blood glucose level was for that period of time.
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Hemoglobin A1c (HbA1c) test
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Blood test to find the blood sugar level a person has averaged over a 2- to 3-month period
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