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30 Cards in this Set

  • Front
  • Back
What is Histology?
The study of tissues.
What is a Pathologist?
looks for tissue changes that indicate disease.
Name the 4 basic tissues.
-Epithelial Tissue
-Connective Tissue
-Muscle Tissue
-Nerve Tissue
Describe epithelial tissue.
-Covers surfaces because cells are ini contact
-Lines Hollow organs, cavities and ducts
-Forms lands when cells sink under the surface
Describe connective tissue.
-Material Found between cells
-Supports and binds structures together
-Stores energy as fat
-Provides immunity to disease
Describe muscle tissue.
-cells shorten in length producing movement
-Shorten and relax (CANNOT elongate)
Describe nerve tissue.
-Cells that conduct electrical signals (much like wiring)
-detects changes inside and outside the body
-Responds with nerve impulses
What is a biopsy?
-Removal of living tissue for microscopic examination
-Useful for diagnosis, especially cancer
Describe 2 kinds of biopsies.
-Surgery (deli slice)
-Needle Biopsy (smear)
What must be done before a biopsy can be viewed?
Tissue must be preserved, sectionaed and stained before microscopic viewing
Describe general features of epithelial tissue.
-Closely packed cells forming continuous sheets
-Cells sit on basement membrane
-Apical (upper) free surface
-Good nerve supply (mitosis)
-Rapid cell division
-Covering/lining versus glandular types
Describe apical free surface of the epithelia tissue.
Upper portion is not in contract with any other cells
Describe avascular of the epithelia tissue.
-Without blood vessels
-Nutrients DIFFUSE in from underlying connective tissue
-Diffuse out of the blook supply into the epithelial tissue
What is going to give rise to the epithelia tissue?
The basement membrane
Name the 2 parts of the basement membrane.
-Basal lamina
-Reticular lamina
Describe the basal lamina.
-From epithelial cells
-Collagen fibers
Describe the reticula lamina.
-Sercreted by connective tissue cells
-Reticular fibers
-Holds cells to connective tissue
-Guide for cell migration during development (move up through the tissue)
What are the 2 types of epithelium?
-Covering and lining epithelium
-Glandular epithelium
Describe covering and ling epithelium.
-Epidermis of skin
-Lining of blood vessels and ducts (cells hooked together)
-Lining respiratory, reproductive, urinary, & GI tract
Describe glandular epithelium.
-Secreting portion of glands
-Thyroid, adrenal, and sweat glands
Name the arrangement of cells of the epithelium.
Describe simple arrangement.
One cell layer thick
Describe stratified arrangement.
May cell layers thick
Describe pseudostratified arrangement.
-Single layer of cells where all cells don't reach apical surface
-Nuclei found at different levels so it looks multilayered
Name the shape of surface cells of the epithelium.
Describe squamous shape.
Describe cuboidal shape.
Describe columnar shape.
-Tall column
-Rectangular shaped
Describe transitional shape
Shape varies with tissue stretching
What is simple squamous epithelium cells
Single layer of flat cells