What is the primary role of the lymphatic system?

Prepare for AAMI Anatomy 1. Utilize flashcards, multiple choice questions with explanations, and detailed study aids. Succeed on your exam!

Multiple Choice

What is the primary role of the lymphatic system?

The lymphatic system’s main job is to return excess interstitial fluid to the bloodstream and support immune defense. Fluid that leaks from capillaries becomes tissue fluid; most of it is reabsorbed into blood vessels, but some enters lymphatic capillaries as lymph. This lymph travels through the lymphatic system and is filtered through lymph nodes, where immune cells inspect it for pathogens and mount defenses. This cleansing and surveillance help keep circulating blood volume steady and protect against infection, with an additional role in fat absorption from the digestive tract. Other options don’t fit because filtering toxins from the blood is mainly done by the liver and kidneys, hormones are produced by endocrine glands, and oxygen is transported by the blood via red blood cells.

The lymphatic system’s main job is to return excess interstitial fluid to the bloodstream and support immune defense. Fluid that leaks from capillaries becomes tissue fluid; most of it is reabsorbed into blood vessels, but some enters lymphatic capillaries as lymph. This lymph travels through the lymphatic system and is filtered through lymph nodes, where immune cells inspect it for pathogens and mount defenses. This cleansing and surveillance help keep circulating blood volume steady and protect against infection, with an additional role in fat absorption from the digestive tract.

Other options don’t fit because filtering toxins from the blood is mainly done by the liver and kidneys, hormones are produced by endocrine glands, and oxygen is transported by the blood via red blood cells.

More practice questions