click below
click below
Normal Size Small Size show me how
SI Lymphatic
Southeastern Institute A&P 13. Lymphatic System
Question | Answer |
---|---|
Lymphatic System Functions | Drains interstitial fluid, Transports lipids & fat soluble vitamins from digestive tract into blood, Immunity against disease |
Lymph | Extracellular fluid found between tissues, fluid of lymphatic system |
Lymphatic System Movement | One direction – toward subclavian veins, Moves only through pressure |
Lymphatic capillaries | Same structure as blood capillaries, Larger & more permeable |
Lymphatic vessels | The pipes of the lymphatic system |
Lymphatic trunks | Where vessels merge before joining the ducts |
Right lymphatic duct | Drains lymph from right arm and right side of head and right thorax to Right Subclavian Vein |
Thoracic duct | Drains lymph from the rest of the body into the Left Subclavian Vein |
Cisterna Chyli | Lymphatic sac at the beginning of the thoracic duct between the abdominal aorta and L2 |
Bone Marrow | Site of hemopoeisis |
Pluripotent Stem Cells | Precursor blood cells |
Lymphocytes | WBC’s |
B cells | Mature in Bone Marrow |
T cells | Mature in thymus |
Thymus | Reaches maximum size by puberty & then atrophies, Maturation of T cells |
Spleen | Largest lymphatic organ, Stores blood cells, Destroys old, worn out RBC’s, Antibody production |
Lymph Nodes | Found along lymphatic vessels, Only place where lymph is filtered, Cervical, axillary & inguinal nodes are routinely checked by physicians |
Mucosal-associated lymphoid tissue (MALT) | Collection of nodules in mucosa or submucosa of digestive tract |
Tonsils | MALT around throat |
Peyer’s Patches | MALT, Intestinal tonsils |
Vermiform appendix | Inferior to the cecum |
Immunity | Defense reaction to microorganisms |
Natural Immunity | Nonspecific response to invading pathogens, like fever & inflammation |
Fever | Elevated body temperature to kill pathogens |
Inflammation | Protective mechanism that stabilizes & prepares damaged tissue, local heat, swelling, redness, pain, & decreased function |
Acquired Immunity | Diverse but specific response to pathogens, Uses lymphocytes |