Vocab Flashcards
Lymphatic vessels
Vessels that carry lymph to its eventual return to the circulatory system
Lymph
Fluid formed in the tissue spaces, that returns excess fluid & protein molecules to the blood
Interstitial fluid
Fluid located in the microscopic spaces between cells
Lymphatic capillaries
Any of the tiny, blind ended lymph collecting tubes distributed in the tissue spaces
-allow excess fluid and some other substances such as dissolved protien molecules to leave the tissue spaces
Right Lymphatic duct
Empties lymph into blood in the neck region
Thoracic duct
Largest lymphatic vessel in the body
- does same as lymphatic duct
- empties lymph in blood in neck region
Cisterna chyli
Serves as temporary holding area for lymph moving toward its point of entry into veins
Lacteals
Lymphatic capillaries in the wall of the small intestine
- transport fats to the bloodstream
Lymph nodes
Located in clusters along the pathway of lymphatic vessels
- small as a pinhead or Lima bean
- performs filtration of lymph on its way to the blood
Afferent lymphatic vessels
Deliver lymph to the node (to carry toward)
Efferent lymphatic vessels
Carey lymphatic fluid away from lymph node (carry away from)
Thymus
Endocrine gland located in the mediastinum
- largest at puberty
- source of lymphocytes before birth
- important a during development
T lymphocytes or T cells
Produce cell mediated immunity
Thymosins
Influence the development of T cells
Palatine tonsils
Located on each side of the throat
-
Pharyngeal tonsils
Aka adenoids when the become swollen
Lingual tonsils
Near the base of the tongue
- serve as the first line of defense from the exterior & are subject to chronic infection
Spleen
Largest lymphoid organ in the body
- filters blood
- destroys worn out red blood cells
- salvages iron from hemoglobin
- Serves as blood reservoir
Splenectomy
Surgical removal of the spleen
Anaphylactic shock
Shock resulting from severe allergic reaction
Could be fatal
Nonspecific immunity aka innate immunity
Maintained by mechanisms that attack any abnormal substance that threatens internal environment
-aka general protection rather than Protection from one specific threat
Inflammatory response
Nonspecific immune process produced in response to injury & resulting in redness, pain, heat, swelling & causing movement of wbc to the affected area
Specific immunity aka adaptive immunity
Includes protective mechanisms that cover very specific protection against certain types of threatening microorganisms or other toxic materials
-involves memory and the ability to recognize & respond to harmful bacteria
Immunization
Artificial exposure to disease to produce acquired immunity