B2:keeping healthy

Frage	Antworten
Bacteria	Single cell microorganisms with no nucleus
Fungi	group of organisms which includes mushrooms and yeast
virus	tiny microorganism with a very simple structure that is reliant on using cells as machinery to reproduce
immune system	Body's defense system against infection and disease it consists of white blood cells and antibodies
white blood cell	type of cell that fights infection
antibody	produces white blood cells to inactivate disease causing microorganisms
antigen	a marker on the surface of a disease causing microorganism
natural immunity	to remain unaffected by a specific disease
side affect	condition caused as a result of taking medication
mutation	spontaneous change in the genetic code of a cell
antimicrobial	chemical that kills bacteria,virus and fungi
clinical trial	process of testing a medical treatment or medicine on human volunteers for safety and effectiveness
artery	muscular blood vessel that carries blood away from the heart
vein	blood vessel carries blood towards heart
capillary	blood vessel that connects arteries to veins were the exchange of material takes place
epidemiological study	study of the factors affecting health and illness of a population
homeostatis	maintenance of constant internal enviroment
hormone	regulatory substance that stimulates cells or tissues into action
anti diuretic hormone (ADH)	hormone that controls concentration of urine
hypothalamus	part of brain responsible for maintaining homeostatis
pituitary gland	small gland at base of brain that produces hormones

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