1 / 12

Histology

Histology. Study of tissues. Tissue is a group of cells with common origin and function. Matrix. Composition of Tissue:. 1. Cells 2. Fibers ( formed intercellular material) 3. Amorphous ground substance. Body Tissues. Four primary types Epithelium Connective tissue Nervous tissue

rashad
Download Presentation

Histology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Histology Study of tissues. Tissue is a group of cells with common origin and function. Matrix Composition of Tissue: • 1. Cells • 2. Fibers (formed intercellular material) • 3. Amorphous ground substance

  2. Body Tissues • Four primary types • Epithelium • Connective tissue • Nervous tissue • Muscle

  3. Epithelial Tissues • Found in different areas • Body coverings • Body linings • Glandular tissue • Functions • Protection • Absorption • Filtration • Secretion

  4. Epithelium Characteristics • Cells fit closely together • Tissue layer always has one free surface • The lower surface is bound by a basement membrane • Avascular (have no blood supply) • Regenerate easily if well nourished

  5. Classification of Epithelium • Number of cell layers • Simple – one layer • Stratified – more than one layer • Shape of cells • Squamous – flattened • Cuboidal – cube-shaped • Columnar – column-like

  6. Connective Tissue • Found everywhere in the body • Includes the most abundant and widely distributed tissues • Functions • Binds body tissues together • Supports the body • Provides protection

  7. Connective Tissue Characteristics • Variations in blood supply • Some tissue types are well vascularized • Some have poor blood supply or are avascular • Extracellular matrix • Non-living material that surrounds living cells

  8. Glands Gland – one or more cells that secretes a particular product Endocrine glands Endo = inside Crine = to secrete Exocrine glands Exo = outside Crine = to secrete

  9. Endocrine Glands Secrete hormones No duct Secrete directly into body fluids Exocrine Glands • Secrete to outside of body • Always have a duct • Secrete onto a surface • Secrete tears, saliva, milk, etc.

  10. Types of Tissue Repair • Regeneration • Replacement of destroyed tissue by the same kind of cells • OR • Fibrosis • Repair by dense fibrous connective tissue (scar tissue) • Determination of method • Type of tissue damaged • Severity of the injury

  11. Events in Tissue Repair • Capillaries become very permeable • Introduce clotting proteins • Wall off injured area • Formation of granulation tissue • Regeneration of surface epithelium

More Related