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Glossary |
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Glossary - V |
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Vaccination
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Vaccination- a form of immunization in which killed or weakened microorganisms are placed into the body, where antibodies against them are developed; if the same types of microorganisms enter the body again, they will be destroyed by the antibodies
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Vaccine
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Vaccine- a preparation of weakened microorganisms given to create resistance to a certain disease
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Varicose veins
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Varicose veins- enlarged, twisted veins just below the surface of the skin, caused by defective valves in the veins
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Vas deferens
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Vas deferens- a thin tube that stores and transports sperm
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Vasculitis
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Vasculitis- inflammation of blood vessels
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Vasectomy
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Vasectomy- a usually permanent method of sterilization in which the tubes carrying sperm from the testicles (the vas deferens) are cut and tied off; as a result, the semen will no longer contain sperm
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Vasoconstriction
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Vasoconstriction- narrowing of blood vessels
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Vasodilation
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Vasodilation- widening of blood vessels
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Vasovagal attack
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Vasovagal attack- a sudden slowing of the heart, causing fainting
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Vein
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Vein- a blood vessel that carries blood toward the heart
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Venereal disease
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Venereal disease- any disease that is usually spread through sexual intercourse or genital contact
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Ventricular fibrillation
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Ventricular fibrillation- rapid, irregular contractions of the heart
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Vertebra
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Vertebra- any one of the 33 bones that make up the spine
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Vertebral arteries
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Vertebral arteries- a pair of arteries running up the neck to supply the brain with blood
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Vertigo
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Vertigo- the feeling that one or one's surroundings are spinning
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Very low
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Very low-density lipoprotein- a class of blood proteins, a high level of which is associated with coronary heart disease
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Virilization
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Virilization- the process by which a woman develops male characteristics; caused by overproduction of male sex hormones
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Visible Fat
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Visible Fat- Added fat during cooking.
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Visual acuity
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Visual acuity- a measure of the sharpness of a person's vision
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Visual field
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Visual field- the area on both sides that can be seen while looking straight ahead
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