Red blood cells that are damaged or defective are removed from the bloodstream by the
(a) Thymus
(b) Lymph nodes
(c) Spleen
(d) Tonsils

Verified step by step guidance

Understand the function of each organ listed in the options: the thymus is primarily involved in T-cell maturation, lymph nodes filter lymph and help in immune responses, the spleen filters blood and removes old or damaged red blood cells, and tonsils are part of the immune system protecting against inhaled or ingested pathogens.

Recall that red blood cells (RBCs) have a limited lifespan and are removed from circulation when they become damaged or defective to maintain healthy blood function.

Identify which organ is responsible for filtering the blood and removing old or defective RBCs; this organ also recycles iron and other components from these cells.

Match the organ responsible for this function to the correct option from the list provided.

Conclude that the organ that removes damaged or defective red blood cells from the bloodstream is the spleen.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Function of the Spleen

The spleen is an organ involved in filtering blood, removing old or damaged red blood cells, and recycling iron. It also plays a role in immune response by producing white blood cells and storing platelets.

Red Blood Cell Lifecycle

Red blood cells have a lifespan of about 120 days, after which they become damaged or less efficient. The body removes these aged cells primarily through organs like the spleen to maintain healthy blood composition.

Role of Lymphatic Organs

Lymphatic organs such as the thymus, lymph nodes, and tonsils are mainly involved in immune system functions like lymphocyte maturation and pathogen filtration, but they do not primarily remove damaged red blood cells.

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