1 / 15

THE EPITHELIAL TISSUE

Lab 2 ZOO 103. THE EPITHELIAL TISSUE . Prepared by : Reem Aldossari. Structure . closely packed cells Specialized to cover external surfaces or line internal cavities.

candie
Download Presentation

THE EPITHELIAL TISSUE

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. Lab 2ZOO 103 THE EPITHELIAL TISSUE Prepared by : Reem Aldossari

  2. Structure • closely packed cells • Specialized to cover external surfaces or line internal cavities. • Epithelial cells are packed tightly together, with almost no intercellular spaces and only a small amount of intercellular substance. • Rest on Basement Membrane • thin sheet of connective tissue • provides structural support for the epithelium • binds it to neighboring structures Functions: • Protection • Permeability • Sensations • Secretions

  3. Types of Epithelial Tissue • Epithelial tissue can be divided into two groups depending on the number of layers of which it is composes. simple epithelium: which consist of only one layer stratified epithelium: which consist of more than one layer squamous epithelium columnar epithelium cuboidal epithelium Thyroid gland Collecting tubule Intestine Stomach ( Squamous,cuboidal,columnar) Skin of Toad ( Frog ) Bowman’s capsule Side view Lining of Mouth Top view

  4. Types of Epithelial Tissue • Epithelial tissue can be divided into two groups depending on their function of which it is composes. • Neuro_epithium Glandular epithelium • Covering “surface” epithelium. • epithelium of cells specialized to produce • secretion. • (Goblet cell) • The Simple. • Stratified.

  5. Simple epithelium Simple epithelium can be subdivided according to the shape and function of its cells. Squamous epithelium • Squamous cells have the appearance of thin, flat plates. • Squamous cells tend to have horizontal flattenednuclei because of the thin flattened form of the cell. • They form the lining of cavities such as the mouth, blood vessels, heart and lungs and

  6. Squamous epithelium

  7. Simple Cuboidal Epithelium • cuboidal cells are roughly square or cuboidal in shape. • Each cell has a spherical central nucleus. • Cuboidal epithelium is found in • glands • lining of the kidney tubules • ducts of the glands

  8. Simple Columnar Epithelium • The cells are elongated and column-shaped. • The nuclei are elongated and are usually oval and basal. • Columnar epithelium forms the lining of the stomach and intestines.

  9. Glandular Epithelium 2 • Glandular Epithelium: epithelium of cells specialized to produce secretion. All glands are of composed of epithelium. • columnar and cuboidal epithelial cells. 1

  10. Under The Microscope

  11. 1 2 3 Simple SquamousEpithelium ( Lining of mouth ) 1-Cell membrane 2- Cytoplasm 3-Nucleus

  12. 3 1 4 2 T.S of (collecting tubule (in the kidney T.S of Thyroid gland Simple Cuboidal Epithelium 1-Nucleus 2-Basement membrane 3-Cuboidal cell 4-Collecting Tubules

  13. 2 1 3 T.S of intestine Simple Columnar Epithelium 1-Nucleus 2-Plasma membrane 3-Basement membrane

  14. 2 1 Epithelium tissues (Goblet cells ) 1-Goblet cells 2-Villi

  15. Thank you for your attention

More Related