BIOL 319: EXAM 1
13 Cards in this Set
| Front | Back |
|---|---|
|
endothelium
|
single layer of simple squamous epithelium which lines the heart, vessels and lymphatic vessels.
Provides a slick, friction-reducing lining
|
|
Mesothelium
|
The epithelium found in serous membranes lining the ventral body cavity and covering its organs.
|
|
simple squamous epithelium
|
Single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm; the simplest of the epithelia
Allows passage of materials by diffusion and filtration in sites where protection is not important; secretes lubricating substances in serosae
|
|
Simple Squamous Epithelium Location
|
kidney glomeruli, air sacs of lungs, lining of the heart, blood vessels and lymphatic vessels, lining of ventral body cavity (serosae)
|
|
Simple Cuboidal Epithelium
|
Consists of a single layer of cube-like cells as tall as they are wide and a spherical, central nucleus. Functions in secretion and absorption
|
|
Simple Cuboidal Epithelium Locations
|
Kidney tubules; ducts and secretory portions of small glands; ovary surface
|
|
Simple Columnar Epithelium
|
Single layer of tall cells with round to oval nuclei; some cells bear cilia; layer may contain goblet cells
Functions in absorption, secretion of mucus, enzymes and other substances; ciliated type propels mucus (or reproductive cells) by ciliary action
|
|
Simple Columnar Epithelium Location
|
Non-ciliated type lines most of the digestive tract (stomach to anal canal), gallbladder and excretory ducts of some glands; ciliated variety lines small bronchi, uterine tubes and some regions of the uterus
|
|
Goblet cells
|
-modified columnar epithelial cells that secrete mucus at their apical surfaces
-unicellular glands
|
|
Stratified Squamous Epithelium
|
-Thick membrane composed of several layers; basal cells are cuboidal or columnar and metabolically active; surface cells are squamous; in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more superficial l…
|
|
Stratified Squamous Epithelium Location
|
Non-keratinized type forms the moist linings of the esophagus, mouth and vagina; keratinized variety forms the epidermis of the skin, a dry membrane
|
|
Pseudostratified Ciliated Columnar Epithelium
|
Single layer of cells of differing heights, some not reaching the free surface; nuclei seen at different levels; may contain mucus-secreting cells and bear cilia
Functions in secretion, particularly of mucus; propulsion of mucus by ciliary action
|
|
Pseudostratified Ciliated Columnar Epithelium Location
|
-Nonciliated type in male's sperm-carrying ducts and ducts of large glands
- Ciliated variety lines the trachea and most of the upper respiratory tract
|
Anatomy - Flashcards