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Man and Diseases

What is a disease? A disease is any condition that impairs functioning of cells, tissues or organs.
What are infectious/communicable diseases? Infectious/Communicable Diseases are diseases thact can be passed from one person to another.
What cause communicable diseases? Communicable diseases are caused by microscopic organisms called pathogens.
What can pathogens be? Pathogens can be a bacterium, virus, fungus or protozoan.
Which organisms can pathogens infect? Pathogens csn infect humans, animsls and plants.
Who is a host? And, why is it called a host? A host is the infected organism. It is called a host because the psthogens lives on/inside it.
What are non-infectious diseases? Non-infectious diseases are diseases that develop because the body is not working.
What are the three groups of non-infectious diseases? The three groups of non-infectious diseases are deficiency, hereditary and physiological diseases.
Resistance The resistance to a disease is the ability to fight it off.
Cholerostol is fatty deposits that blocks the arteries and restrict blood flow.
Pathogenic Diseasess Pathogenic diseases are disease caused by disease-causing organisms/pathogens. E.g. Influenza
Deficiency Diseases Deficiency diseases are disease caused by lack of nutrient in a diet. E.g. Scurvy
Hereditary Disease Hereditary diseases are diseases caused by a mutant allele. It is passed on through chromosomes. E.g. Sickle cell
Physiological Diseases Physiological diseases are disease caused by malfunction of organs or organ systems. E.g. Hypertension
Vectors Vectors are organisms that carry pathogens and help them to spread.
Zoonotic diseases Zoonotic diseases are diseases that can be passed from animals to humans.
Created by: Tavi bryan
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