Lymphatic System Notes
-
Upload
shakopee-public-schools -
Category
Education
-
view
127 -
download
13
description
Transcript of Lymphatic System Notes
![Page 1: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/1.jpg)
Essentials of Human Anatomy & Physiology
Mr. Hildebrandt
Anatomy & Physiology IIThe Lymphatic System
![Page 2: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/2.jpg)
The Lymphatic SystemThe Lymphatic System
Slide 12.1
Lymphatic system functions:
Transport clean fluids back to the blood
Drains excess fluids from tissues
Removes “debris” from cells of body
Transports fats from digestive system
![Page 3: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/3.jpg)
When things go wrong…..When things go wrong…..
![Page 4: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/4.jpg)
Lymphatic CharacteristicsLymphatic Characteristics Lymph – excess tissue fluid carried by
lymphatic vessels
It’s a passive system: One way system toward the heart
No pump
Lymph moves toward the heart Milking action of skeletal muscle
Rhythmic contraction of smooth muscle in vessel walls
Gravity effects movement
![Page 5: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/5.jpg)
Lymphatic CapillariesLymphatic Capillaries
Fluid leaks through mini-valves into lymph capillaries
Higher pressure on the inside closes mini-valves
![Page 6: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/6.jpg)
Lymphatic VesselsLymphatic VesselsCollects lymph from
lymph capillaries
Delivers lymph to lymph nodes
Returns fluid to circulatory veins near the heart
Right lymphatic duct
Thoracic duct
![Page 7: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/7.jpg)
Lymphatic System StructuresLymphatic System Structures
![Page 8: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/8.jpg)
Lymph NodesLymph Nodes Filter lymph before it is
returned to the blood
Defense cells in nodes:
Medulla houses macrophages which engulf and destroy foreign substances
Cortex nurtures lymphocytes which provide immune response to antigens (cortex)
![Page 9: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/9.jpg)
Flow of Lymph Through NodesFlow of Lymph Through Nodes
Lymph enters the convex side through afferent lymphatic vessels
Lymph flows through a number of sinuses inside the node
Lymph exits through efferent lymphatic vessels
Fewer efferent than afferent vessels causes flow to be slowed
![Page 10: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/10.jpg)
Lymphoid OrgansLymphoid Organs
Several other organs contribute to lymphatic function
Spleen
Thymus
Tonsils
Peyer’s patchesFigure 12.5
![Page 11: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/11.jpg)
The SpleenThe Spleen
Filters blood
Destroys worn out blood cells
Forms blood cells in the fetus
Acts as a blood reservoir
![Page 12: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/12.jpg)
The ThymusThe Thymus
Functions at peak levels only during childhood
Produces hormones (like thymosin) to program lymphocytes
![Page 13: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/13.jpg)
TonsilsTonsils Small masses of
lymphoid tissue around the pharynx
Trap and remove bacteria and other foreign materials
Tonsillitis is caused by congestion with bacteria
![Page 14: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/14.jpg)
Peyer’s Patches Peyer’s Patches “Tonsils of the intestine” “Tonsils of the intestine”
Found in the wall of the small intestine
Capture and destroy bacteria in the intestine
![Page 15: Lymphatic System Notes](https://reader036.fdocuments.in/reader036/viewer/2022081412/54559c55af79595d048b5285/html5/thumbnails/15.jpg)
Mucosa-Associated Lymphatic Mucosa-Associated Lymphatic Tissue (MALT)Tissue (MALT)
Includes:
Peyer’s patches
Tonsils
Other small accumulations of lymphoid tissue
Acts as a sentinal to protect respiratory and digestive tracts