What is the internal line of defense that filters blood and helps to destroy microorganisms?

Question

Quizplus · Accepted Answer

The spleen is a part of the lymphatic system and filters blood to remove old or damaged red blood cells as well as harmful microorganisms. It also contains special cells that help to destroy these microorganisms. The thymus and bone marrow are also part of the lymphatic system, but they primarily play a role in the development and maturation of immune cells. The heart is not directly involved in the body's defense against microorganisms.

What Is the Internal Line of Defense That Filters Blood