Understanding the Lymphatic System

The video explores the lymphatic system, often overshadowed in biology. It explains lymph, derived from blood plasma, and its journey through lymphatic capillaries, vessels, and ducts, returning to the circulatory system. The lymphatic system's role in immune function is highlighted, with lymph nodes filtering pathogens and housing immune cells like lymphocytes and macrophages. The video also covers lymphatic organs like the spleen and tonsils, and primary lymphoid organs such as bone marrow and the thymus. Disorders like lymphedema and lymphatic filariasis are discussed, emphasizing the system's importance.

Which body system is often combined with the lymphatic system due to its functions?

• Respiratory system

• Circulatory system

• Immune system

• Digestive system

What is the fluid called that is derived from blood plasma and travels through the lymphatic system?

• Cerebrospinal fluid

• Interstitial fluid

• Lymph

• Synovial fluid

How does lymph move through the lymphatic system?

• Pumped by the heart

• Through skeletal muscle movements

• Via gravity

• By the action of cilia

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

• Regulate body temperature

• Store nutrients

• Filter lymph and house immune cells

• Produce red blood cells

Which of the following is NOT a secondary lymphoid organ?

• Tonsils

• Thymus

• Lymph nodes

• Spleen

Where do B cells develop and mature?

• Red bone marrow

• Spleen

• Thymus

• Lymph nodes

What happens to the thymus as a person ages?

• It enlarges

• It remains the same size

• It shrinks and decreases in activity

• It becomes more active

What is the condition called when lymph accumulates in tissues causing swelling?

• Lymphadenopathy

• Lymphoma

• Lymphedema

• Edema

Which parasite is responsible for causing lymphatic filariasis?

• Virus

• Nematode

• Fungus

• Bacteria

How are nematodes that cause lymphatic filariasis transmitted to humans?

• By direct contact

• Via mosquito bites

• Through contaminated water

• Through food