Glossary


 

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V

Vaccination

treatment to provide immunity against disease


Vaccine

a substance that causes an animal to make an active immune response


Vacuoles

small storage facilities in cells


Vagina

canal that leads from the cervix of the uterus to the outside in female animals


Vas deferens

the tube that carries sperm from the testis to the urethra; also called the deferent duct


Vasoconstriction

narrowing of the blood vessels


Vasodilation

widening of the blood vessels


Vector

living organism that spreads disease between animals or people


Vein

a blood vessel that takes blood from the organs and tissues back to the heart


Vena cava

the largest vein in the body that returns deoxygenated blood to the heart



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