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Avian Flu
Flu primarily caused by viruses that normally infect only birds (e.g. H5N1 virus). Transmission…
Arterial partial pressure of oxygen (PaO2)
Measures the pressure of oxygen dissolved in the blood and how well the oxygen…
Arteries
Blood vessels that carry blood away from the heart; structural characteristics are designed to…
Arterioles
Thin-walled, small-diameter resistance vessels that are branches of small-diameter arteries; a high proportion of…
Arteriosclerosis
Condition in which arteries lose elasticity, becoming hard and narrow; occlusion or blockage can…
Articular process
The articular processes (zygapophyses) of a vertebra, two superior and two inferior, spring from…
Arytenoid cartilages
Paired cartilages that articulate with the cricoid cartilage of the larynx. The posterior ends…
