Which are lymphatic structures?

Which are lymphatic structures?

• A. Heart, lungs, and blood vessels
• B. Kidneys and liver
• C. Tonsils/adenoids, thymus gland, spleen, lymph nodes, and lymphatic vessels
• D. Brain and spinal cord

Answer: (C)

The lymphatic system includes a network of vessels and lymphoid tissues where immune responses develop and are coordinated. The tonsils and adenoids are lymphoid structures that help defend the mouth and throat. The thymus is where T cells mature. The spleen filters blood and contributes to immune defense. Lymph nodes filter lymph and host immune cells that monitor for invaders. Lymphatic vessels transport lymph between tissues and these lymphoid sites. In short, these components are classic parts of the lymphatic/immune system. Structures like the heart, lungs, and blood vessels belong to the circulatory system; kidneys and liver are primarily excretory/metabolic organs; and the brain and spinal cord belong to the nervous system.

The lymphatic system includes a network of vessels and lymphoid tissues where immune responses develop and are coordinated. The tonsils and adenoids are lymphoid structures that help defend the mouth and throat. The thymus is where T cells mature. The spleen filters blood and contributes to immune defense. Lymph nodes filter lymph and host immune cells that monitor for invaders. Lymphatic vessels transport lymph between tissues and these lymphoid sites. In short, these components are classic parts of the lymphatic/immune system. Structures like the heart, lungs, and blood vessels belong to the circulatory system; kidneys and liver are primarily excretory/metabolic organs; and the brain and spinal cord belong to the nervous system.