Epithelium Flashcards
What is the definition of epithelium?
Epithelium is a type of tissue that covers the surfaces of the body, inside and out.
What are the 5 functions of epithelial tissue?
Protection, absorption, secretion, sensation and transport
Fill in the blank: Epithelial cells are avascular, meaning they lack _________.
blood vessels
What are the two main types of epithelial tissue based on the number of cell layers?
Simple and stratified epithelium
Which type of epithelium is made up of a single layer of cells?
Simple epithelium
Which type of epithelium is made up of multiple layers of cells?
Stratified epithelium
What is the function of simple squamous epithelium?
Allows for diffusion and filtration
Where is simple squamous epithelium found in the body?
Lining blood vessels and air sacs of lungs
What is the function of simple cuboidal epithelium?
Secretion and absorption
Where is simple cuboidal epithelium found in the body?
Kidney tubules and gland ducts
What is the function of simple columnar epithelium?
Absorption and secretion
Where is simple columnar epithelium found in the body?
Intestines and stomach lining
What is the function of pseudostratified columnar epithelium?
Protection and secretion
Where is pseudostratified columnar epithelium found in the body?
Respiratory tract
What is the function of stratified squamous epithelium?
Protection against abrasion
Where is stratified squamous epithelium found in the body?
Skin and lining of the mouth
What is the function of transitional epithelium?
Allows for stretching and recoiling
Where is transitional epithelium found in the body?
Urinary bladder
What is the function of glandular epithelium?
Secretion of hormones and enzymes
Where is glandular epithelium found in the body?
Endocrine and exocrine glands
What is the basement membrane?
A thin, delicate membrane that separates epithelial tissue from underlying connective tissue
What is the apical surface of epithelial cells?
The top surface that faces the external environment or a body cavity
What is the basolateral surface of epithelial cells?
The sides and bottom surface of epithelial cells that are in contact with neighboring cells and the basement membrane
What are the 5 functions of epithelium?
Secretion, sensation, protection, absorption and transport
What are the 5 characteristics of epithelium?
Cellularity(tightly packed), polarity, avascular, regenerative, supported by connective tissue
What separates an epithelium from the underlying connective tissue
Basement membrane
What specializations are found on the apical surface of epithelial cells and their function?
Microvilli and cilia to help with movement
What shapes of epithelial cells are found on the surface of epithelia?
. Squamous
. Cuboidal
. Columnar
What three features are used to classify epithelia?
Polarity, cellularity, vascularity
What Epithelium lines the Oral Cavity?
Squamous stratified epithelium
What epithelium is found within salivary glands?
Stratified Cuboidal epithelium
What membrane is found inside the oral cavity and where is its lubricant formed?
Mucous membrane
What Epithelium covers the hard palate and the tongue and the external surface of the
gingiva?
Squamous stratified epithelium
What is the difference between an endocrine gland and an exocrine gland?
Please give an example of both
Endocrine release hormones into the blood stream whilst exocrine secrete substances to the organs or body surface such as sweat glands and done by glandular epithelium
In observing epithelial cells under a microscope, the cells are arranged in a single layer
and look tall and narrow, and the nucleus is located close to the basal side of the cell. The
specimen is what type of epithelial tissue?
a) Columnar
b) Stratified
c) Squamous
d) Transitional
Columnar
Which of the following is the epithelial tissue that lines the interior of blood vessels?
a) Columnar
b) Pseudostratified
c) Simple Squamous
d) Transitional
Simple Squamous
Which type of epithelial tissue specializes in moving particles across its surface and is found
in airways and lining of the oviduct?
a) Stratified Columnar
b) Transitional
c) Stratified Squamous
d) Pseudostratified ciliated columnar
Pseudostratified ciliated columnar
Pictures of types of epithelium
