Lymph

Definition

Lymph is a clear fluid that circulates through the lymphatic system, carrying cells that help fight infection and disease. It is composed mainly of white blood cells, especially lymphocytes, and also contains proteins and fats.

5 Must Know Facts For Your Next Test

1. Lymph is formed from interstitial fluid collected through lymph capillaries.
2. It plays a crucial role in immune system function by transporting white blood cells to and from lymph nodes.
3. The movement of lymph is driven by muscle contractions and body movements, as it lacks its own pumping mechanism.
4. Lymph nodes filter pathogens and debris from the lymph before it returns to the bloodstream.
5. The composition of lymph can change depending on the region of the body it drains from, often containing more lipids after digestion.

Review Questions

• What role does lymph play in the immune system?
• How is lymph moved through the body?
• Why are lymph nodes important for filtering lymph?

Related terms

Interstitial Fluid: Fluid that surrounds tissue cells and becomes lymph when collected into lymph capillaries.

Lymphocyte: A type of white blood cell found in high concentrations within the lymph.

Lymph Node: Small, bean-shaped structures that filter harmful substances from lymph before it re-enters the bloodstream.