Lymphatic System

Question 1

The lymphatic system consists of:

Answer 1

• A fluid known as lymph
• Lymph capillaries
• Lymphatic vessels (larger than capillaries)
• Lymph nodes
• Tonsils, thymus and spleen

Question 2

Function of the lymphatic system

Answer 2

• Drain away excess fluid in the tissue back into the blood
• Cells in the lymph nodes remove bacteria and foreign substances
• Cells in tonsils, thymus and spleen are involved in immune responses

Question 3

Movement of lymph

Answer 3

• Concentration of skeletal muscle helps to push lymph along. No pump.
• Lymphatic vessels have valves to stop lymph flowing in the wrong direction
• Lymph is returned to the blood through the thoracic duct and right subclavian duct