The Human Body Major Systems & Organs - The Immune System And Lymphatic System

The video explains the immune system, primarily located in the blood, as a subsystem of the circulatory system. It describes how white blood cells fight pathogens like bacteria, viruses, and fungi. The immune response involves recognizing and attacking foreign invaders, aided by proteins and antibodies. The lymphatic system also plays a crucial role in fighting infections by filtering out microorganisms. Vaccines help train the immune system by introducing disabled pathogens, enabling the body to recognize and combat future infections effectively.

What is the primary location of the immune system in the body?

• In the skin

• In the liver

• In the brain

• In the blood

Which of the following is NOT a characteristic of viruses?

• They cannot reproduce on their own

• They contain DNA

• They have a protein coat

• They are living organisms

What is the role of antibodies in the immune system?

• To produce red blood cells

• To transport oxygen

• To attach to pathogens and help direct the immune response

• To digest nutrients

Which part of the immune system is responsible for filtering out disease-causing microorganisms?

• The lymphatic system

• The circulatory system

• The nervous system

• The digestive system

How do vaccines help the immune system?

• By eliminating all bacteria from the body

• By introducing active pathogens to strengthen the immune response

• By training the immune system to recognize and remember pathogens

• By increasing the number of red blood cells