Question

Foreign particles circulating in the blood are filtered by the __________. a. spleen b. lymph nodes c. MALT d. lymph

Short answer

Answer: a. spleen

Step-by-step solution

Explanation of Answer Choices

Let's look at each answer choice and discuss their functions: a. Spleen - A soft, spongy organ part of the immune system that filters blood, destroys old or damaged red blood cells, and stores blood and platelets. b. Lymph Nodes - Small, bean-shaped structures that produce and store cells that fight infections and other diseases. They filter lymph, not blood. c. MALT - Mucosa-associated lymphoid tissues, located in the gut wall. They form part of the first line of defense and initiate immune responses against pathogens. d. Lymph - A colorless fluid containing white blood cells. It circulates through the lymphatic system that helps rid the body of toxins and waste.

Select the Correct Answer

Based on the explanations above, the answer is a. spleen. The spleen is the organ responsible for filtering foreign particles circulating in the blood, while the other options are either involved in the immune system in a different way or are not directly involved in filtering blood.