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balloon angioplasty balloon angioplasty
Angioplasty, balloon Balloon angioplasty is a medical technique used to widen coronary (heart) arteries that have been narrowed by plaque (fatty material) deposits that cling to the inside of the artery walls. In a coronary (heart) disease called atherosclerosis ("hardening of the arteries"), the... Read more
sickle cell disease sickle cell disease
sickle cell disease or sickle cell anemia, inherited disorder of the blood in which the oxygen-carrying hemoglobin pigment in erythrocytes (red blood cells) is abnormal. This "hemoglobin-S" crystallizes in small capillaries, where the concentration of oxygen in the blood is low (but... Read more
malaria malaria
malaria infectious parasitic disease that can be either acute or chronic and is frequently recurrent. Malaria is common in Africa, Central and South America, the Mediterranean countries, Asia, and many of the Pacific islands. In the United States it was found in the South and less frequently in the... Read more
mussel mussel
mussel edible freshwater or marine bivalve mollusk. Mussels are able to move slowly by means of the muscular foot. They feed and breathe by filtering water through extensible tubes called siphons; a large mussel filters 10 gal (38 liters) of water per day. The close-fitting shells protect the... Read more
Sewage treatment Sewage treatment
Wastewater treatment Wastewater often mixes with free-flowing water in rivers , streams, oceans, lakes , and other bodies of water. The addition of wastewater can radically alter the chemistry—and the ecological dynamics—of water bodies and hydrologic reservoirs. Wastewater... Read more
pickerelweed pickerelweed
pickerelweed common name for the Pontederiaceae, a family of chiefly tropical perennial aquatic herbs found in freshwater. The pickerelweeds (genus Pontederia ) range north into temperate regions, including most of the E United States and Canada. The water hyacinth ( Eichhornia crassipes ), a... Read more
Zatec Zatec
Žatec, Czech Republic Zateč, Saaz Named after a local brook with the same name. This was derived possibly from the Old Czech zatkati ‘to block up’, a reference to the clogging of the brook with sediment. It has also been suggested that it is derived from the root žat... Read more
Eustachian tube Eustachian tube
Eustachian tube [for Bartolomeo Eustachi ], a hollow structure of bone and cartilage extending from the middle ear to the rear of the throat, or pharynx, technically known as the pharyngotympanic or auditory tube. By permitting air to leave or enter the middle ear, the tube equalizes air... Read more
angioplasty angioplasty
angioplasty , any surgical repair of a blood vessel, especially balloon angioplasty or percutaneous transluminal coronary angioplasty, a treatment of coronary artery disease . In balloon angioplasty a balloon-tipped catheter is inserted through the skin into a blood vessel and maneuvered to... Read more

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