Exercise 3: Epithelial Tissues Flashcards
Keratin makes our skin waterproof
TRUE ANG SAGOT SINAMA KO LANG PARA EME
3 Major Functions of Epithelial Tissues
- Covering
- Absorption
- Secretion
The connecting tissue that underlies the epithelial lining of the organs of the digestive, respiratory, and urinary systems
Lamina Propria
It is frequently in epithelial tissues subject to friction like covering of the skin or tongue
Papillae
It is the most apical of the junctions; are seen in cells of epithelial tissue that line the stomach, intestines, and urinary bladder
Tight Junction
Link cytoskeletons of adjacent cells to form a strong cohesive epithelium
Adherent Junction/Zonula Adherens
Anchors cytoskeleton to the basal lamina
Hemidesmosome
Allows direct transfer of small molecules and ions from one cell to another (intercellular signaling)
Gap Junctions/Nexus
Changes shapes, from squamous to cuboidal and back, as organs like the urinary bladder stretch to a larger size and then collapse to a smaller size
Transitional cells
Consists of two or more layers of cells that protect the underlying tissues in locations where there is considerable wear and tear
Stratified epithelium
It lines the cardiovascular and lymphatic systems and is present at sites of filtration, diffusion, and secretion in serous membranes
Simple Squamous Epithelium
A single layer of cube-shaped cells that covers the surface of the ovary, lines the anterior surface of the capsule of the lens of the eye;
Function: Secretion and Absorption
Simple Cuboidal Epithelium
It lines the gastrointestinal tract (stomach and anus), ducts of many glans, and the gallbladder since it is a single layer of nonciliated column-like cells
Simple Columnar Epithelium
It is a single layer of ciliated column-like cells that lines some bronchioles of the respiratory tract, fallopian tube, and the uterus
Ciliated Simple Columnar Epithelium
Signe-celled glands like the Goblet cells
Unicellular Glands
