Textbook Question
Foreign molecules that elicit an immune response are called
a. Major histocompatibility complex (MHC) molecules.
b. Antibodies.
c. Histamines.
d. Antigens.
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41. Immune System
Immune System
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Which organ of the lymphatic system is primarily responsible for removing old or damaged red blood cells from circulation?
A
Thymus
B
Tonsils
C
Lymph nodes
D
Spleen
Verified step by step guidance1
Understand the role of the lymphatic system: The lymphatic system is responsible for immune responses, fluid balance, and filtering out harmful substances. Different organs within this system have specialized functions.
Learn the function of the spleen: The spleen is a key organ in the lymphatic system. It filters blood, removes old or damaged red blood cells, and helps fight infections by producing white blood cells.
Compare the functions of other lymphatic organs: The thymus is involved in the maturation of T-cells (a type of white blood cell). The tonsils trap pathogens entering through the mouth or nose. Lymph nodes filter lymph fluid and house immune cells but do not directly remove red blood cells.
Identify the correct organ based on its function: Since the spleen is specifically responsible for filtering blood and removing old or damaged red blood cells, it is the correct answer.
Conclude that the spleen is the organ primarily responsible for removing old or damaged red blood cells from circulation, as none of the other options perform this function.
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