How Is Blood Lymph Formed

Lymph. Lymph is a fluid similar in composition to blood plasma. It is derived from blood plasma as fluids pass through capillary walls at the arterial end. As the interstitial fluid begins to accumulate, it is picked up and removed by tiny lymphatic vessels and returned to the blood.

What does the lymph do?

The lymphatic (lim-FAT-ik) system works to keep body fluid levels in balance and to defend the body against infections. It is made up of a network of lymphatic vessels that carry lymph — a clear, watery fluid that contains proteins, salts, and other substances — throughout the body.

Where is lymph produced in the body?

Lymph is formed when the interstitial fluid is collected through tiny lymph capillaries (see diagram), which are located throughout the body. It is then transported through lymph vessels to lymph nodes, which clean and filter it.