Trauma Any wound or injury. An involuntary trembling motion of the body. An open sore on any external or internal surface of the body. The tissues of an ulcerous area rot away, and pus can ooze from the sore. Vaccine A solution containing a killed or altered strain of a disease-producing organism.
Vaccines create resistance to the diseases they cause.
Vasoconstrictor A substance, such as a nerve or a drug, that causes blood vessels to narrow. Vasodilator A substance, such as a nerve or a drug, that causes blood vessels to widen. X-rays Rays with a short wavelength that enables them to pass through body tissues. X-rays are used in diagnostics and radiation therapy. Loma Linda University.