LO: SWBAT understand and explain how our body comes under attack. DN: List some ways in which you can get sick. What causes you to be sick? HW: August 2015 #58,59

the body is not working as it should The body is not in homeostasis What is wrong? Disease- the body is not working as it should The body is not in homeostasis Show movie Outbreak

What is the common theme? Disease in humans may result from foreign invader organisms called….. PATHOGENS Pathogen: any disease causing organism

Pathogens Bacteria Viruses Fungi Parasites

Bacteria Characteristics Prokaryotes Unicellular organisms Lack most ORGANELLES, no true nucleus.

Examples Antibiotics Strep throat Salmonella – toxins Syphilis What will the doctor Give you? Antibiotics

Virus A VIRUS IS NOT A CELL (IT IS NOT ALIVE) DNA or RNA + Protein Coat Very small, smaller then a CELL. They can only reproduce INSIDE a cell. A virus works by injecting its DNA into a cell, turning the cell into a virus producing factory.

Can you take antibiotics? Examples HIV Chicken Pox Influenza Can you take antibiotics?

Antibiotics will not work on a virus- they are specific for bacteria.

Fungus Athlete’s foot Ring worm What can the doctor Prescribe? Fungicides

Organisms that feed off of other organisms Parasites Organisms that feed off of other organisms Examples: tapeworm, heartworm, trypanosoma, toxocara To lose weight, pills that had tapeworms

Host: The organisms that the pathogen is living/feeding off of Vector: What is transmitting the pathogen. A vector could be living or nonliving. Examples: other animals, insects, water, desk

How are pathogens transmitted? Blood Food Sex Air Animal

Diagnosing – determine the disease you have Diagnosis is made based on symptoms , examination and testing

Prevention vs. Treatment Prevention – ways to avoid getting the disease. Treatment – ways to help people with a disease to get better.

Besides pathogens, what else can cause disease? Toxic Substances Inherited Disorder Organ Malfunction Poor Nutrition Risky Personal Behavior