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Announcements

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Title: Announcements


1
Announcements
  • Exams-
  • Extra Credit -
  • Lab 5 - Lymphatic System

2
Lecture Overview
  • Lymphatic System and Components
  • What is lymph and how does it travel?
  • General Immune Reaction- Inflammation
  • What is one function of the cells carried in
    lymph?
  • Selected Topics in Immunity

3
Lymphatic System
  • Absorbs excess fluid from the tissues
  • Returns this fluid to the circulatory system or
    the heart
  • Additional function in Immunity

4
Components of the Lymphatic System
  • Lymph
  • Lymphatic Tissue
  • Lymphatic Vessels
  • Thymus
  • Bone Marrow
  • Spleen

5
Lymph
  • Lymph
  • The clear fluid absorbed by the lymphatic system
  • Lymphatic Tissue
  • Clusters of Lymphocytes and macrophages

6
Lymphatic Tissue
  • Malt (Mucosa Associated Lymphatic Tissue)
  • Diffuse array of lymphocytes found along body
    passages in mucous membranes.
  • Examples of malt lining of the stomach and
    respiratory tract
  • Lymph nodules
  • Dense clusters of Lymphocytes
  • Transient pop up during infection

7
Lymphatic Vessels
  • Carry and Transport Lymph and proteins
  • Similar Structure to veins
  • Tunica Interna Thin inner lining and valves
  • Tunica Media Elastic fibers and Smooth Muscle
  • Tunica Externa Thin Outer Layer

8
Lymphatic Filters
  • Lymph Nodes- Screen and Filter Lymph for
    infectious particles
  • Spleen- Screen and Filter Blood for old, dead
    cells and infectious particles

9
  • Subclavian
  • 2 collecting Trunks
  • 6 Lymphatic Trunks
  • More Collecting Vessels
  • Lymph Nodes
  • Collecting Vessels
  • Lymphatic Vessels

10
Lymphatic Movement
  • No pump
  • Rhythmic contraction of the lymph vessels
  • Skeletal Muscles
  • How is backflow prevented?

11
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12
Immune Cell Generators
  • Bone Marrow- Makes B- Cells
  • Thymus- Makes T- Cells

13
Thymus
14
Break for Dynamic Human
15
Inflammation
  • Non-specific response to tissue trauma or
    infection

16
4 signs of Inflammation
17
4 signs of Inflammation
  • Redness
  • Swelling
  • Heat
  • Pain
  • What
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