Ascending aorta
Ascending aorta: The first section of the aorta, which starts from the left ventricle of the heart and extends to the aortic arch. The right and left coronary arteries that supply blood to the heart muscle arise from the ascending aorta.
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- Ascending pathway
Ascending pathway: A nerve pathway that goes upward from the spinal cord toward the brain carrying sensory information from the body to the brain. In contrast, descending pathways are nerve pathways that go down the spinal cord and allow the brain to control movement of the body below the head.
- Ascites
An abnormal accumulation of fluid within the abdomen. There are many causes of ascites, including cirrhosis of the liver, cancer within the abdomen, congestive heart failure, and tuberculosis.
- Asclepius
Asclepius: One of the earliest Greek gods to specialize in healing. He was known to the Romans as Aesculapius. Healers and those in need of healing invoked Asclepius’ name in prayer and healing ceremonies in temples and at home. A healing clan known as the Asclepiads claimed to be the descendants of Asclepius and to […]
- Ascorbic acid
Ascorbic acid: Vitamin C, an essential nutrient found mainly in fruits and vegetables. The body requires ascorbic acid in order to form and maintain bones, blood vessels, and skin. Ascorbic acid also promotes the healing of cuts, abrasions and wounds; helps fight infections; inhibits conversion of irritants in smog, tobacco smoke, and certain foods into […]
- Ascus
ASCUS: An acronym for Atypical Squamous Cells of Undetermined Significance. This term is used in the Bethesda System for reporting Pap smear findings, and indicates that some flat (squamous) cells look unusual and may or may not be pre-malignant or malignant.