The Circulatory System Part 3: The Lymphatic System

The video explains the lymphatic system, highlighting its role in maintaining blood volume and supporting the immune system. It covers fluid dynamics in the body, the structure and function of lymphatic vessels, and the components of the lymphatic system, including lymph nodes and lymphoid organs like the spleen and thymus. The lymphatic system's unique features, such as its lack of a central pump and reliance on pressure changes, are also discussed.

What percentage of fluid is not reabsorbed into the capillaries and is managed by the lymphatic system?

• 10%

• 25%

• 15%

• 20%

What is the primary function of lymph nodes in the lymphatic system?

• To pump lymph throughout the body

• To store excess blood

• To filter lymph and activate the immune system

• To produce red blood cells

Which type of tissue is found throughout the lymphatic system, except in the thymus?

• Dense connective tissue

• Loose reticular connective tissue

• Adipose tissue

• Cartilaginous tissue

What is the main role of the spleen in the lymphatic system?

• To produce lymphocytes

• To store lymph

• To filter lymph

• To cleanse blood and salvage iron

Where is the thymus located, and what is its primary function?

• In the abdomen; to filter blood

• In the brain; to regulate hormones

• In the thorax; to develop lymphocytes

• In the neck; to produce red blood cells

What is the function of Peyer's patches in the lymphatic system?

• To produce antibodies

• To filter blood

• To store excess lymph

• To destroy bacteria in the small intestine

Which lymphoid organ is responsible for removing old and damaged red blood cells?

• Thymus

• Spleen

• Tonsils

• Appendix