Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 -Avascular -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.
|
-Simple
-Stratified -Pseudostratified |
|
|
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.
|
-Squamous
-Cuboidal -Columna -Transitional |
|
|
Describe squamous shape.
|
Flat
|
|
|
Describe cuboidal shape.
|
Cube-shaped
|
|
|
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
|
