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Biol 216 Week 5 Lymphatic System

by: Charissa Notetaker

Biol 216 Week 5 Lymphatic System biol 216

Marketplace > Liberty University > Biology > biol 216 > Biol 216 Week 5 Lymphatic System
Charissa Notetaker

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About this Document

PowerPoints and book
Human Anatomy and Physiology 11 Lab
Ms. Lenz
Class Notes
LYMPHATIC SYSTEM, Medical Terminology Immune system Lymphatic system
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This 3 page Class Notes was uploaded by Charissa Notetaker on Thursday October 6, 2016. The Class Notes belongs to biol 216 at Liberty University taught by Ms. Lenz in Fall 2016. Since its upload, it has received 4 views. For similar materials see Human Anatomy and Physiology 11 Lab in Biology at Liberty University.


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Date Created: 10/06/16
Lymphatic System Functions 1. Circulates interstitial fluids. a. AKA extracellular fluid – surrounds cells in tissues. b. Enters from arterial capillaries but does not enter venous circulation. c. Edema – accumulation of fluid in body tissues. 2. Cleanses those fluids of debris, wastes and most importantly invading organisms. a. Ex. Bacteria. Tissue Fluid Circulation 1. Collected fluid is called  lymph. a. Drains into lymphatic capillaries. b. Passes through lymph nodes. i. Filtered and cleansed.  Lymph Flow 1. Lymphatic capillaries. 2. Lymphatic collecting vessels. 3. Lymphatic ducts. 4. Right lymphatic duct. a. Drains right side of thorax, head, and arm. 5. Or thoracic duct. a. Drains rest of the body. 6. Cisterna chyli. a. Lymph from legs and abdomen collects here before entering thoracic duct. b. Receives fatty chyle from intestines (rich in lipids). 7. Unidirectional – toward the heart. 8. Lymph vessels contain numerous valves. 9. Lymph is propelled by massaging action of working skeletal muscles.  Lymph Nodes 1. Large nodes: a. Inguinal. i. Groin area. b. Axillary. i. Armpit. c. Cervical. i. Neck. d. Mammary (females). i. Breasts. 2. Clustered in moist, warm areas subject to invasion by pathogens. 3. During infection they may become swollen. Lymph Node Anatomy 1. Afferent ducts. 2. Efferent ducts. 3. Cortex. 4. Medulla.  5. Follicles. 6. Rich in lymphocytes.  Other Organs & Tissues 1. Spleen: a. Filters blood. 2. Tonsils: a. 3 pairs: palatine, lingual & pharyngeal. 3. Thymus: a. Development of T cells. b. Atrophies with age. 4. Peyer’s patches: a. Lymphoid tissues distributed along the GI tract. b. Density increases toward distal end where E. coli grows abundantly. Lymph Node Histology  Spleen Histology  Peyer’s Patches Histology


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