Histology - Epithelial Tissue Flashcards
What is Epithelial Tissue?
Tissue composed of cells that line the cavities and surfaces of structrues throughout the body
Identify the following
Simple Squamous
Simple Cuboidal
Simple Columnar
Identify the following
Stratified Squamous
Stratified Cuboidal
Pseudostratified Columnar
Where is Simple Squamous Epithelium located?
Air sacs in lungs (alveoli)
Lining lumen of blood vessels (endothelium
Serous membranes of body cavities (mesothelium)
Identify the Following
Simple Squamous Epithelium
Identify the Following
Keratinized Stratified Squamous Epithelium
Where is Keratinezed Stratified Squamous Epithelium located?
Epidermis (skin)
Identify the Following
Nonkeratinezed (moist) Stratified Squamous Epithelium
Where is Nonkeratinized Stratified Squamous Epithelium located?
Lining of oral cavity
Part of: pharynx, esophagus, vagina, and anus
Identify the following
Simple Cuboidal Epithelium
Where is Simple Cuboidal Epithelium located?
Thyroid gland follicles
Kindey tubules
ducts and secretory regions of many glands
Identify
Stratified Cuboidal Epithelium
Where is Stratified Cuboidal Epithelium located?
Large ducts in most exocrine glands
Some parts of the male urethra
Identify
Ciliated Simple Columnar Epithelium
Where is Ciliated Simple Columnar Epithelium located?
Lining of uterine tubes
Larer bronchioles of respiratory tract
Identify
Simple Columnar Epithelium
Where is (nonciliated) Simple Columnar Epithelium located?
Lining most of GI tract
Identify
Stratified Columnar Epithelium
Where is Stratified Columnar Epithelium located?
(Rare)
Large ducts of some exocrine glands
Some regions of the male urethra
Identify
Pseudostratified Columnar Epithelium
Where is Pseudostratified Columnar Epithelium located?
Cilitated form lines most of the respiratory tract
-nasal cavity; part of pharynx, larynx, trachea, bronchi
Identify
Transitional Epithelium
Where is Transitional Epithelium located?
Lining of:
Urinary bladder
Ureters
Part of urethra
Epithelial Cells are connected to each other how?
Cell Junction and Extracellular Material
Epithelial tissues generally contain ______ _____ but no _____ _______
Nerve endings
Blood vessels
4 Junctions and extracellular material?
Tight Junctions
Adhering Junctions
Desmosomes
Gap Junctions
What are Tight Junctions for?
Prevent molecules from traveling between epithelial cells
What do Adhering Junctions do?
Surround the cell deep to tight junctions
What are Desmosomes for?
“Buttons” between two adjacent cells that help strengthen sheets of epithelial cells
[Appear at locations of mechanical stress and are often continuous w/intermediate filaments]
What runs between desmosomes and hemidesmosomes?
Intermediate Filaments
What are Gap Junctions for?
Allow adjacent cells to communicate with each other
[…by the flow of ions and other small molecular messengers]
Identify
1: Apical Surface l 2: Lateral Surface
3: Basal Surface l 4: Blood Vessel
5: Epithelium l 6: Basal Lamina
7: Reticular Lamina l 8: Connective Tissue
9: Basement Membrane
Identify
1: Tight Junctions
2: Membrane Protein l 3: Plasma Membrane
4: Adhering Junctions l 5: Microfilament
6: Intercellular Space
7: Adjacent Plasma Membranes
8: Desmosomes l 9: Protein Filaments
10: Protein Plaque l 11: Intermediat Filaments
12: Plasma Membrane l 13: Intercellular Space
14: Gap Junctions l 15: Pore l 16: Connexon
