The bowel twists upon itself occluding the flow; bowel obstruction.

Tidal Volume (approximately 0.5 L in an average young adult man)

Measurement of the amount of weight necessary to propagate a tear after a V has been cut.

A measure of the total amount of usable air available in the lungs following a maximal inspiratory effort (approximately 4.8 L); VC equals the sum of the inspiratory reserve volume, tidal volume, and the expiratory reserve volume. SEE lung volumes.

A strong band of elastic tissue lying within the vocal fold. Vocal ligaments form the medial edge of the rima glottides.

Electromotive force, pressure, or potential expressed in volts.

A blood vessel that carries blood low in oxygen content from the body, back to the heart. The deoxygenated form of hemoglobin (deoxyhemoglobin) in venous blood makes it appear dark. Veins are part of the afferent wing of the circulatory system which returns blood to the heart. The blood is darker than oxygenated blood.

Usually refers to polyvinylchloride (PVC). Resin used as a rubber substitute (e.g. as gloves) in many medical and industrial applications. Although the material itself is a barrier to microorganisms, its non-elastic properties do not allow for maintenance of barrier integrity after extended use, or in rigorous procedures.

Surgical incision in the vein (e.g. to perform angioplasty).

An agent that renders viruses non-infective.