What is lymph derived from?

• A. Cellular waste
• B. Muscle tissue
• C. Plasma
• D. Nerve endings

Answer: (C)

Lymph is derived from plasma, which is the liquid component of blood. When blood circulates through the capillaries, some components, primarily water, electrolytes, and small proteins, leak out into the surrounding tissues. This fluid, which is similar to plasma but has a lower concentration of proteins, is then collected by the lymphatic system. As it moves through this system, the fluid is called lymph. It travels through lymph vessels, where it can be filtered through lymph nodes, helping the body fight infections and maintain fluid balance.

Understanding the source of lymph is crucial for grasping the functioning of the immune system and the fluid balance in the body. It highlights the connection between the circulatory and lymphatic systems, both of which play essential roles in overall health.