Science

• Skin: oil and sweat destroy pathogens. Pathogensfall off of the skin with the deadskin when you sweat. takesoff 90% of Pathogens.
• Nose and Throat: Mucus oilia trap and remove pathogens. (sneezingand coughing).
• Mouth and Stomach:Saliva an stomach acid destroy the pathogens.

• 1-When fluid and white blood cells leak from blood vessels into nearby tissues and then fight te pathogens.
• 2-Blood vessels widen and blood flows to the infected area. The area becomes inflamme.
• 3-PHAGOCYTES ARRIVE- White blood cells that surrounds pathogen and destroys it.

• LYMPHOCYTE-White blood cells that tell te difference between different pathogens.
• T-CELL- identify and tell each pathogens apart.
• B-CELL- Produce proteins that destroy the pathogens.
• ANTIBODIES= the protein that help destroy the pathogen.

• Micro organisms that are SO small you need a microscope to see them.
• -GERMS
• -THINGS THAT MAKE YOU SICK!

• 1: Bacteria
• 2: Viruses
• 3: Fungi

• -Contact with an infected person, soil, food, water
• -Infected animal
• -Contaminated objects

• -surfaces of th skin
• -mouth
• -breathing passages
• -stomach functions

• -Infectious Disease
• -Non-infectious Diseases

-its caused by pesence of allowing thing.

-Disease you can spend

• -they are spread by:
• -Ifected people
• -Contaminated objects
• -Food
• -Water

Ex: IV (Aids), Polio, Chicken Pox, Colds, Pnemonia

• -No caused by pathogens
• -You can't "catch" the disease
• -Include cardiovascular disease that you are born with.

Ex: Asthma, Diebeates, Cancer, Allergies

by a vaccine so you can become immune to that disease when ever youraround i.

• 1-Active Immunity
• 2-Passive Immunity

when you make your own antibodies to a pathogen.

Ex: Chicken Pox vaccine for polio, measles.

When a person makes immunity from an outside source.

Ex: Baby from utero receives antibodies that are passed from mother's blood into baby's blood, good for few months after birh.

When you get a vaccine you get a weakend sample of the disease so that your pathogens can make an antibodi to fight the disease.

becaus it immedeately attacks and destroys the Tcells in the immune system because the immune sytems are no longer functioning properly whenpeople with AIDS become sick with diseases not normally found in people with healthy immune systems.

a special type of white blood cell that surrounds pathogens and destroys them by breaking them down.

White blood cells that distinguish between different kinds of pathogens.

You take medication/antibiotic.

• Chemical that either kills or slow down bacteria.
• -Does not work on viruses.

Taken to treat symtoms or illness

one celled organisms that can either damage cells directly or can produce a toxin (poison) that damages cells.

Ex:strptococcus bacteria-invades cells in throat

Very tiny particles that invade cells to reproduce, in this process they destroy the cell.

Ex:cold and flu viruses invade cells of respiratory system.

Not usually microscope and includes organisms such as mold and yeast.

Ex: athlete's foot and ringworm

• -Grow in size(Viruses do not get bigger)
• -Respond to stimuli (Viruses will not move if you touc it)
• -Eat (Viruses don't need food for nutrition)

they both reproduce

DNAand RNA

• -copies the same deverytime
• -never mutates!!
• -you can be vaccinated
• -Ex: Chicken pox, small pox, polio, sometimes hepotitise, measles, mumps

• -doesn't copy the same every time
• -always mutating!!
• -hard to vaccinate against
• -Ex: Flu, cold, HIV.

active viruses and latent viruses

• -starts reproducing immediately
• -colds, flu

• -appears to HIDE for a little while
• -waits to reproduce
• -HIV cold sores

• -made from damaged viru particles that can't cause a disease anymore
• -you usually receive a vaccine in the form of a shot
• -vaccines prevent you from getting that virus again