The Immune System - Pages 172 - 173

The body has amazing abilities to defend itself from the invasion of _________________ .

• immunity

• barriers

• lymph nodes

• pathogens

What are some barriers that the immune system includes?

• skin

• mouth

• stomach

• breathing passages

When invaders (pathogens) get into the body and damage cells, what carries these foreign invaders away from the body's tissues and blood?

• thymus gland

• adenoids

• lymphatic system

• antibodies

What is a watery fluid that contains dissolved materials and special white blood cells?

• nodes

• lymph

• tonsils

• spleen

What trap pathogens?

• lymph nodes

• antibodies

• lymph

• bone marrow

What first destroy the invaders (pathogens) that enter our body and try to harm the body's tissues and cells?

• lymph nodes

• antibodies

• barriers

• white blood cells

Sometimes, when you are sick, the lymph nodes in your neck will swell. Why?

• The red blood cells are trapped in the lymph nodes.

• The lymph nodes are tired from fighting off the pathogens.

• The white blood cells are multiplying in order to fight the infection.

• The barriers won't let the infection out.

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What changes some white blood cells into a different type of white blood cells?

• spleen

• thymus gland

• tonsils

What filters the blood?

• spleen

• thymus gland

• tonsils

What traps pathogens and fights infection?

• spleen

• thymus gland

• tonsils