551-560 of 663 Results Found
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The Cardiologist A cardiologist is a doctor who has had extra training to treat problems of the heart and blood vessels. A cardiologist has at least 10 years of medical training. It includes: 4 years of medical school. 3 years of training in internal medicine. 3 or more years in
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Dialysis in Children What is dialysis? Dialysis is a procedure that is done routinely on people who have acute or chronic kidney (renal) failure. It filters waste and extra fluid from the blood. That is something that would normally be done by the kidneys. Dialysis may also be
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Allergens: Pollen What is pollen? Pollen is the tiny egg-shaped male cells of plants, including trees, grasses, and weeds. Pollen is microscopic in size. It is the most common cause of hay fever (seasonal allergic rhinitis). Which plants produce pollen that cause allergic
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Trinucleotide Repeats: Fragile X Syndrome What are trinucleotide repeats? DNA is the chemical that makes up your genes. It contains a "code" of 3-letter words known as codons or trinucleotides. Many genes normally contain trinucleotide sequences that repeat. These are called
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Amenorrhea in Adolescents and Teens What is amenorrhea? Amenorrhea is a menstrual condition characterized by absent menstrual periods for more than 3 monthly menstrual cycles. Amenorrhea may be classified as primary or secondary: Primary amenorrhea. From the beginning and may be
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Wisdom Teeth Extraction What are wisdom teeth? Wisdom teeth are the last 4 permanent teeth to appear in the back of the mouth at the top and bottom. They often first appear in young adults between the ages of 17 to 21. They are also called third molars., If wisdom teeth do not
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Ear, Nose, and Throat Facts What is the ear? The ear is the organ of hearing and balance. The ear is made up of: External or outer ear. This includes: Pinna or auricle. This is the outside part of the ear. External auditory canal or tube. This is the tube that connects the outer
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Molds in the Environment What is mold? A mold is a microscopic fungus that grows and lives on plant or animal matter. It can also live on nonorganic objects. Most molds are made up of filaments. They reproduce through the production of spores. Spores spread by air, water, or
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Staying Healthy After Menopause The key to staying youthful and active after menopause is good nutrition and regular physical activity. Nutrition after menopause As you age, your nutritional needs change. Before menopause, you should have about 1,000 mg of calcium daily. After
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The Menstrual Cycle: An Overview What is ovulation? When a young woman reaches puberty, she starts to ovulate. This is when a mature egg or ovum is released from one of the ovaries. The ovaries are the two female reproductive organs found in the pelvis. If the egg is fertilized