First and Second Line of Defense

Front

What is a first line defense?

Back

Physical and chemical barriers which prevent disease-causing pathogens from entering your body.

Front

What is a second and third line defense?

Back

Our defense system which destroys pathogens in the body.

Front

Which type of external defense is not considered a 'first line defense'? Options: Tears, Saliva, Skin (epithelial cells), Mucous and cilia.

Back

Lymphatic Organs

Front

What is your skin considered as?

Back

Skin is considered as first line defense barrier.

Front

What are saliva, tears, mucus and sweat considered to be?

Back

They are considered to be substances which helps destroy pathogens.

Front

Which structure/s take part in the reflex movements and secretions which remove pathogens from body openings?

Back

Cilia and mucus.

Front

The second and third line defense system is made up of a set of organs and tissues that help protect us from pathogens present inside the human body. Which of the following is not considered a part of this system? Options: White blood cells, Lymphocytes, Lymphatic organs, Mucus, Phagocytes

Back

Mucus

Front

White blood cells or leukocytes are the body's immune cells. Which two types of cells do they consist of?

Back

Phagocytes and lymphocytes

Front

Where are all white blood cells produced?

Back

In bone marrow.

Front

What is the purpose of the body's defense system?

Back

To stop pathogens getting into the body and destroy pathogens inside the body.