Online College Courses for Credit

Lymphatic System

Lymphatic System

Author: Nathan Lampson

This lesson will identify the major structures and will discuss the function of the lymphatic system.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

311 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Terms to Know

A clear colorless fluid similar to plasma that circulates throughout lymphatic vessels on its way to the blood stream; lymph contains far less protein than plasma.

Lymph Node

A bean-shaped organ of the lymphatic system that ranges in size from microscopic to the size of a kidney bean. Lymph nodes contain dense populations of white blood cells, especially lymphoctyes, and filter lymph as if flows through the node.

Lymph Vascular System

A system of lymphatic vessels that are used to circulate lymph back into the blood stream; lymphatic vessels circulate lymph through lymph nodes to be filtered before entering the blood stream.

Lymphatic System

A system of vessels, nodes, glands, and lymph nodules that serves two major bodily functions: completing the fluid cycle by returning excess tissue fluid into the blood and producing, maturing and storing cells of the immune system.


The largest lymphatic organ that acts like a lymph node by filtering blood as it flows through it. The spleen is located in the upper left quadrant of the abdomen. The spleen internally contains white and red pulp and is often called a blood reservoir.


A gland located in the mediastinum (cavity between the lungs) just above the heart that matures T cells, not produces them.