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AV

Alveolar Ventilation

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Avian Flu

Flu primarily caused by viruses that normally infect only birds (e.g. H5N1 virus). Transmission…

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Axial nerve

The axial nerve or circumflex nerve is a nerve that comes off the brachial…

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Axis

The second cervical vertebra (C2) of the spine; aka epistropheus.

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Axons

A long slender projection of a nerve cell that conducts electrical impulses away from…

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Arterial partial pressure of oxygen (PaO2)

Measures the pressure of oxygen dissolved in the blood and how well the oxygen…

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Arteries

Blood vessels that carry blood away from the heart; structural characteristics are designed to…

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Arterioles

Thin-walled, small-diameter resistance vessels that are branches of small-diameter arteries; a high proportion of…

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Arteriosclerosis

Condition in which arteries lose elasticity, becoming hard and narrow; occlusion or blockage can…

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Articular facet

A surface where two anatomical structures (usually bones) meet.

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Articular process

The articular processes (zygapophyses) of a vertebra, two superior and two inferior, spring from…

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Arytenoid cartilages

Paired cartilages that articulate with the cricoid cartilage of the larynx. The posterior ends…

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