Lymphatic system Flashcards
What are the 3 functions of the lymphatic system?
- draining interstitial fluid.
- transporting dietary lipids
- protection
What is lymph?
interstitial fluid collected by lymph capillaries.
What are the 2 major lymphatic ducts?
Thoracic- 3/4 of the body.
right lymphatic duct-right arm and right side of upper torso
Where do these ducts empty into the circulating system?
subclavian vein
where would you find the cistern chyli
bottom end of thoracic duct
what are the primary organs of the lymphatic system?
red bone marrow and thymus gland
what are the secondary organs of the lymphatic duct?
lymph nodes, lymph nodules, spleen
describe the structure and the function of a lymph node.
made of a capsule, cortex, medulla. provide biological filtration
What does albumin do for the blood?
maintains osmotic pressure
what happens when the flow of lymph is blocked?
edema
What are lacteals and what do they do?
specialized lymphatic capillaries in villi of small intestine that transports lipids
What are lymph nodules?
follicular dendritic cells found in the cortex
what is MALT? what are peyer’s patches?
mucosa associated lymphoid tissue. Lymph nodules found in ileum
What are tonsils? 3 major tonsils?
lymphoid tissue under the mucous membranes of the throat. 1. palatine. 2. pharyngeal 3. lingual
What does the thymus do? Where is it located?
in mediastinum above the heart. produces thymosin-aids in maturation of T-cells
What is the white pulp of the spleen? Red pulp?
largest of the lymph organs, the spleen has white pulp-mostly b cells (islands) and red pulp-venous sinuses
What are the functions of the spleen?
blood formation, blood filtration, and platelet storage
What is resistance?
ability to ward off disease
What is susceptibility?
lack of resistance
What lowers skin pH
lactic acid
What is lysozyme?
enzymes that damage bacterial cell walls.
How do transferrins prevent microbe growth?
tie up free iron
What is compliment?
10-20 normally inactive proteins that when activated, enhance certain immune reactions. (activate inflammation, opsonization, cytolysis
How does fever help the body fight off infection?
causes liver and spleen to sequester iron, increases phagocytosis, inhibits microbe growth, speeds up body repair.
