A
Anything that stops the body from functioning properly
disease
single cell organism that is either spherical, spiral or rod-shaped pathogen
bacteria
microorganisms that cause disease
Pathogens
diseases caused by pathogens that can be transmitted from one person to another
infectious diseases
Able to be passed easily from one person to another.
Contagious
isolation to prevent the spread of disease
quarantine
A chemical that kills bacteria or slows their growth without harming body cells. eg penicillin
antibiotic
Body system that fights off infections. eg. lymphatic system
immune system
Blood cells that fights off disease-causing microorganisms eg lymphocytes, neutrophils and macrophages
white blood cells
foreign substances that trigger the attack of antibodies in the immune response
Antigens
An organism that absorbs nutrients from the environment eg athletes foot
Fungi
A tiny, nonliving particle that invades and then reproduces inside a living cell.
Virus
A type of white blood cells produced by the lymphatic system. They make antibodies that marks pathogens for destruction
Lymphocytes
Protein produced by lymphocytes that marks specific pathogens
antibodies
white blood cells that engulf and digest pathogens that are marked by lymphocytes
Macrophages:
white blood cells found in the blood that kills pathogens and other foreign bodies
Neutrophils
Skin, mucous membranes, tears, and secretions
first line of defense
conditions and practices that promote good health
hygiene
substance prepared from killed or weakened pathogens and introduced into a body to initiate natural immunity
vaccine:
Disease caused by parasites, such as lice and mites
Parasitic disease
neutrophils- white blood cells in the blood
second line of defense
an organism that lives in or on another organism and feeding off it eg. leeches and fleas
parasite
a chemical that kills fungi
fungicide
lymphatic system - lymphocytes and macrophages
third line of defense
antibiotic: A chemical that kills bacteria or slows their ______ without harming body cells. eg penicillin
growth