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AP II Ch 22
The Lymphatic System
| Question | Answer |
|---|---|
| What are the fuctions of the lymphatic system? | Fluid balance,Fat absorption,and Defense |
| Describe the fuction of fluid balance within the lymphatic system. | 90% of plasma fluid that escapes from the capillaries is recovered but the other 10% remains in the tissues as interstitial fluid. This can cause damaged tissue so the 10% enters the lympatic capillaries as lymph and pass thru the lymphatic vessels back i |
| Describe the fuction of fat absorption in the lymphatic system. | Lymphatic vessels w/in the digestice tract called lacteals absorb fats & other substances. These fats go thru the lymphatic system to join the lymphatic circulation. |
| What is chyle? | lymph passing thru with milky appearance b/c of high fat content |
| Describe the fuction of defense w/in the lymphatic system. | blook is filtered of microorganisms by the spleen,lymph is filtered of microorganisms by the lymph nodes,lymphocytes are capable of destroying microorganisms and other foreign substances |
| Describe the path way for Lymph vessels. | L.Capillaries-L.Vessels-Lymph Nodes-L.Vessels-L.Trunks-Veins |
| What type of cells overlap in the capillary walls? | Simple Squ Epi |
| Once fluid is inside the lymphatic vessels it is called what? | Lymph |
| The overlapping of cells in the capillary wall fits what purpose? | 1.makes them more permeable than capillaries in the cardio system 2. nothing is excluded from the lymph via filration 3. acts as a valve system preventing back flow |
| What causes calces in capillaries to open allowing fluid movement? | increase pressure from the interstitial fluid |
| Where are these lymphatic capillaries located that drain interstitial fluid? | Alost every tissue in the body |
| describe the appearance of lymphatic vessels and its purpose of shape | beaded shape to insure 1 way flow, when it become compressed lymph moves from chamber to chamber |
| Capillaries join to form ______ that resemble _______ with a middle layer of ________. | larger lymphatic vessels, small veins, smooth muscle |
| What are the different mechanisms responsbile | Contraction of lymph vessels,contraction of skeletal muscle,thoracic pressure of changes |
| What is contractin of lymph vessels | pacemake cells cause contraction of smooth muscle in the vessel wall as they fill with lymph advanc lymph to next chamber |
| what is contraction of skeletal muscle | Vessel gets squeezed between contracting muscle & w/valves lymph advances |
| What is thoracic pressure change | like sucking air from a straw to draw up liquid the pressure changes in the thoracic cavity suck up lymph from vessels |
| What is the fuction of lymph nodes | filter lymph that enters and exits thru the lymphatic vessels,connected to each other |
Created by:
bellarouge84
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