The Lymphatic System and Immunity

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What is the primary function of the lymphatic system?

The primary function of the lymphatic system is to return excess tissue fluid to the bloodstream and to help defend the body against infection.

What are lymph nodes and what is their function?

Lymph nodes are small, bean-shaped structures that filter lymph fluid and house lymphocytes to fight infections.

What type of cells are stored in the lymph nodes?

Lymph nodes store white blood cells called lymphocytes, which are part of the immune system.

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

The spleen filters blood, removes old red blood cells, and helps fight infections.

How does the lymphatic system collaborate with the circulatory system?

The lymphatic system helps maintain fluid balance by returning interstitial fluid to the bloodstream.

What is lymph?

Lymph is a fluid containing white blood cells that circulates through the lymphatic system.

What is the thymus and its role in immunity?

The thymus is an organ in the lymphatic system where T-cells mature, which are critical for adaptive immunity.

How do lymphatic vessels differ from blood vessels?

Lymphatic vessels transport lymph fluid and have valves similar to veins to prevent backflow.

What is innate immunity?

Innate immunity is the body's first line of defense, consisting of physical, chemical, and cellular defenses against pathogens.

What is adaptive immunity?

Adaptive immunity is a type of defense that learns and remembers specific pathogens to fight them more effectively in the future.

What are antibodies?

Antibodies are proteins produced by B-cells that recognize and help neutralize pathogens.

What is the role of T-cells in the immune response?

T-cells help destroy infected cells and coordinate the body's immune response.

What is an autoimmune disease?

An autoimmune disease occurs when the immune system mistakenly attacks the body's own cells.

What is the difference between active and passive immunity?

Active immunity is developed when the body is exposed to a pathogen, while passive immunity is acquired from another source, like maternal antibodies.

How does the lymphatic system help transport dietary fats?

The lymphatic system absorbs fats and fatty acids from the digestive tract through structures called lacteals.