Immune System

An organism that causes a disease......

• blood cell

• pathogen

• oxygen

The body system that protects us from disease ........

• immune system

• repiratory system

• digestive system

How many lines of defense does our body have to keep pathogens from getting in?

• 5

• 3

• 1

The skin is one of our first lines of defense.

• true

• false

The breathing passages have hairs, mucus, and _________ that traps pathogens in the air.

• cilia

• oxygen

• air sacs

What type of cells fight pathogens?

• muscles

• white blood cells

• chemicals

A fever is your body's way of _____________

• cleansing

• fighting infection

• digesting

Which would most likely prevent a cold virus from spreading in a classroom?

• tissue at a teacher's desk
• students wash hands regularly with soap 
• students shake hands regularly with each other
• students wipe desks with dry paper towels

A disease that is harmful to the body and is contagious is called....

• Non-Infectious
• Infectious

An increase in body temperature when sick.

• infection

• fever

• skin