Question

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what are the components of the lymphatic system?
muscles, bones, and skin layers.
nerve cells, spinal cord, and brain stem.
lymph vessels, lymph nodes, and lymphatic organs.
kidneys, bladder, and urethra.
blood vessels, blood nodes, and blood organs.

Explanation:

The lymphatic system is composed of lymph vessels (which transport lymph fluid), lymph nodes (which filter lymph and house immune cells), and lymphatic organs (such as the spleen, thymus, and tonsils which play roles in immune function and filtering). Muscles, bones, skin layers relate to the musculoskeletal and integumentary systems. Nerve cells, spinal cord, brain stem are part of the nervous system. Kidneys, bladder, urethra are components of the urinary system. Blood vessels are part of the circulatory system, and there is no such thing as "blood nodes" in standard anatomical terminology.

Answer:

Lymph vessels, lymph nodes, and lymphatic organs.