The Immune System and Microbes

What is the main function of the immune system?

• To help digest food

• To protect the body against microbes and sicknesses

• To produce energy

• To help the body grow

What are microbes?

• Large animals that live in water

• Microorganisms that we cannot see that enter our bodies and cause diseases and illnesses

• Vitamins that help our body

• Cells that fight infections

Name the three main groups of microbes mentioned in the passage. (Fill in the blank)

• bacteria, fungi, viruses,

• bacteria, fungi, plants,

• bacteria, animals, protozoa

• bacteria, fungi, insects

The first line of defense in the immune system includes skin, saliva, ear wax, tears, gastric juices, and cilia.

• True

• False

Which part of the immune system contains enzymes that break down the cell wall of many bacteria?

• Tears, ear wax, mucus, and saliva

• Bone marrow

• Spleen

• Antibodies

What is the role of cilia in the immune system?

• Cilia are small hairs that move mucus with trapped particles away from our lungs.

• Cilia produce antibodies to fight infections directly in the bloodstream.

• Cilia are responsible for digesting food in the stomach.

• Cilia help in the formation of red blood cells.

What are antibodies and what do they do?

• Antibodies are produced by the immune system to help fight off infections and other diseases.

• Antibodies are hormones that regulate metabolism and growth in the body.

• Antibodies are enzymes that help digest food in the stomach.

• Antibodies are cells that transport oxygen throughout the body.

What are the six main parts of primary defence system and how do they protect you?

Name two main parts of the secondary defence system an what they do.