Which organ system includes the spleen and the tonsils? Group of answer choices
digestive
lymphatic
endocrine
nervous
cardiovascular
The correct answer and explanation is:
Correct Answer: Lymphatic
Explanation (300 words)
The spleen and the tonsils are both part of the lymphatic system, which plays a crucial role in supporting the immune system and maintaining fluid balance in the body.
The lymphatic system consists of lymph, lymph vessels, lymph nodes, and lymphoid organs such as the spleen, thymus, tonsils, and Peyer’s patches. This system collects excess fluid from tissues (lymph), filters it, and returns it to the bloodstream. It also helps defend the body against pathogens, foreign substances, and abnormal cells.
- Spleen: Located in the upper left abdomen, the spleen filters the blood by removing old or damaged red blood cells and platelets. It also plays a critical role in immune responses by producing lymphocytes (a type of white blood cell) and storing monocytes, another type of immune cell.
- Tonsils: These are small masses of lymphoid tissue located at the back of the throat. They act as the body’s first line of defense against ingested or inhaled pathogens. The tonsils trap bacteria and viruses and stimulate an immune response.
The spleen and tonsils do not belong to the:
- Digestive system – which includes organs like the stomach, intestines, and liver, responsible for processing food.
- Endocrine system – which involves glands like the thyroid and pancreas that secrete hormones.
- Nervous system – composed of the brain, spinal cord, and nerves for transmitting signals.
- Cardiovascular system – which includes the heart and blood vessels, circulating blood throughout the body.
Therefore, the lymphatic system is the correct and most appropriate classification, as both the spleen and tonsils are lymphoid organs integral to immune function and fluid regulation.