[01] Lymphatic System Structure and Function Flashcards
What are the main components of the lymphatic system?
- Lymph nodes
- Lymph vessels
- Spleen
- Thymus
- Tonsils
What is the primary function of the lymphatic system?
Defense against infection and disease
How does the lymphatic system contribute to fluid balance in the body?
It returns excess tissue fluid to the bloodstream
What is lymph?
A clear fluid containing white blood cells, especially lymphocytes
What are lymph nodes?
Small, bean-shaped structures that filter lymph and house lymphocytes
What is the role of the spleen in the lymphatic system?
It filters blood and helps the body fight infections
What are the functions of the thymus?
- Produces mature T-lymphocytes
- Regulates the immune response
What are tonsils?
Lymphoid tissues located at the back of the throat and nasal cavity
What are lymphocytes?
White blood cells that play an integral part in the body’s immune response
How is lymph moved through the body?
Through the contraction of skeletal muscles and the presence of one-way valves in lymph vessels
What is the function of the lymphatic capillaries?
They absorb excess tissue fluid and return it to the bloodstream
How does the lymphatic system work with the circulatory system?
It returns filtered lymph to the circulatory system via the subclavian veins
How is lymph filtered?
It passes through lymph nodes where pathogens and other harmful substances are removed
What are the primary lymphoid organs?
- Thymus
- Bone marrow
What are the secondary lymphoid organs?
- Lymph nodes
- Spleen
- Tonsils
- Peyer’s patches in the small intestine
What is lymphedema?
A condition characterized by swelling due to an obstruction in the lymphatic system
What role do lymphocytes play in immunity?
They respond to foreign substances in the body and play a key role in the adaptive immune response
What are B cells?
Lymphocytes that mature in the bone marrow and produce antibodies
What are T cells?
Lymphocytes that mature in the thymus and are involved in cell-mediated immunity
What is the role of the lymphatic system in lipid absorption?
It absorbs dietary fats from the digestive system via lacteals in the small intestine
