The Lymphatic System (7.4) Flashcards
Describe lymphatic system
Body system that transports immune cells including APCs throughout the body
State what immune response the lymphatic system plays a key role in
Adaptive immune response
State what the lymphatic system transports
Immune cells
State the 4 major roles of the lymphatic system
- returning fluid that seeps out of the blood vessels back to the circulatory system
- absorbing/transporting fatty acids from the digestive system
- providing a place for lymphocytes to mature
- transporting lymphocytes and APCs to lymph nodes
State to where invading pathogens are transported to by the lymphatic system
Invading pathogens are transported in the lymph to the lymph nodes
State what occurs to the invading pathogens that penetrate the lymph nodes
Trapped and destroyed by phagocytes and lymphocytes
State what causes lymph nodes to swell during an infection
Trapping and destroying of bacteria, viruses and cancer cells
State the 4 structures that make up the lymphatic system
- lymph
- lymphatic vessels
- primary lymphoid organs/tissues
- secondary lymphoid organs/tissues
Describe interstitial fluid
Drained into lymphatic vessels
Describe lymph
Colourless fluid that contains white blood cells, bathes tissues and travels through the lymphatic system.
State what immune cells are contained within the lymph
- lymphocytes
- phagocytes
State 2 regions where lymphatic vessels are absent within the body
- bones
2. CNS
State by which process cells and fluid can pass between blood and lymph capillaries
Extravasation
Describe primary lymphoid organs
Major organs of the lymphatic system
Describe secondary lymphoid organs and tissues
Organs and tissues of the lymphatic system in which adaptive immune responses are initiated
