Lymphatic System 1 Flashcards
(23 cards)
Additional substances that cannot enter or return through the capillary walls, including excess fluid and protein molecules
Lymph
Interstitial fluid
Tissue fluid
A network of tiny blind ended tubes distributed in the tissue spaces
Lymphatic capillaries
How are lymphatic and blood capillaries similar
- microscopic
- simple squamous epithelium
Differences between lymphatic and blood capillaries
- lymph mvmt goes one way only
- endothelial cells are tighter in the blood capillaries
Two terminal vessels for lymph
Right lymphatic duct and thoracic duct
3/4 lymph eventually flows where?
Thoracic duct
Largest lymphatic vessel in the body
Thoracic duct
A temporary holding area for lymph moving toward its point of entry into the veins in the abdomen
Cisterns Chyli
Lymphatic capillaries in the wall of the small intestine are referred to as
Lacteals
Filters lymph fluid before being emptied into the venous system
Lymph nodes
Importance of the structure of the lymph nodes
Defense and white blood cell formation
Important structural units of the lymph system
Lymph nodes, tonsils, thymus, and spleen
Vessels the deliver lymph to the node
Afferent lymphatic vessels
Vessel in which lymph exits the node
Efferent lymphatic vessel
Special roles of the thymus
Source of lymphocytes before birth.
Thymosins influence the development of T cells
Different types of tonsils
Palatine, pharyngeal, lingual
Tonsils located on each side of the throat
Palatine
Near the protection opening of the nasal cavity when swollen
Pharyngeal
Tonsils near the base of the tongue
Lingual
Largest lymphoid organ in the body
Spleen
Functions of the spleen
Removes bacteria, destroys old blood cells, and salvages iron from hemoglobin for future use and stores blood that is not being used.
Defense mechanism referred to as a “safety net”
Immune system
