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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 |
Created by:
cmcracken
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