Immune System Functions and Structures

The video explains the immune system's structure, comparing it to a country's defense system. It highlights the skin as a physical barrier and discusses primary lymphoid organs like bone marrow and thymus, where immune cells develop. Secondary lymphoid organs, such as lymph nodes and spleen, are described as sites where immune cells differentiate. The video concludes with a call to action for viewers to engage with the content.

What is the primary function of the skin in the immune system?

• To store immune cells

• To act as a physical barrier

• To produce antibodies

• To generate white blood cells

Which of the following is a primary lymphoid organ?

• Peyer's patch

• Spleen

• Lymph node

• Bone marrow

What type of cells are developed in the bone marrow?

• B cells

• All types of blood cells

• T cells

• Red blood cells

What is the role of the thymus in the immune system?

• To produce antibodies

• To train and mature T cells

• To filter blood

• To store B cells

During T cell maturation, what determines if a T cell becomes a helper or cytotoxic T cell?

• Location in the body

• Type of antigen recognized

• Presence of antibodies

• Interaction with dendritic cells

What is the primary function of lymph nodes?

• To filter lymph

• To produce red blood cells

• To store antibodies

• To generate T cells

Where do B cells reside within the lymph node?

• In the white pulp

• In the para cortex

• In the germinal center

• In the red pulp

What is the primary role of the spleen in the immune system?

• To produce antibodies

• To trap blood-borne antigens

• To generate T cells

• To store lymph

Which organ is known as the 'graveyard' of red blood cells?

• Spleen

• Bone marrow

• Liver

• Thymus

Where is Peyer's patch located?

• In the lymph node

• In the intestine

• In the thymus

• In the spleen