Human Epithelia Review September 23

Anatomy and Physiology
A Summary of Epithelial Tissue Organizational Types


Below each picture, give a general description of the tissue type and list locations in the body in which it is found.


Simple Squamous Epithelium:

Characteristics of simple squamous epithelial tissue:

It is the simplest of the epitheliums. It is a single layer of flat cells, disc-shaped, not much cytoplasm. BY


Examples of simple squamous epithelial tissue:
Found in the lining of the heart, blood vessels, lymphatic vessels; in the air sacs of lungs. BY


2. Simple Cuboidal Epithelium



Characteristics of simple cuboidal epithelial tissue:

It is a single layer of cube shaped cells. BY



Examples of simple cuboidal epithelial tissue:

It is found in the kidney tubules; ducts and secretory portions of small glands; and ovary surface. BY







Simple Columnar Epithelium

Characteristics of simple columnar epithelial tissue:
It is a single layer of tall cells. Some cells have cilia; may have mucus-secreting unicellular glands. BY

Examples of simple columnar epithelial tissue:
One type lines most of the digestive tract (stomach and anal canal), gall bladder; ciliated variety lines small bronchi, uterine tubes, some parts of the uterus. BY













4. Pseudostratified Columnar Epithelium

Characteristics of pseudostratified columnar epithelial tissue:

This epithelial tissue is a single layer of cells with different heights. It’s function is to secrete, mostly mucus. BY



Examples of pseudostratified columnar epithelial tissue:
The nonciliated type is found in male’s sperm-carrying ducts and the ducts of large glands. The ciliated type has a variety; lining the trachea, most of the upper respiratory tract. BY


5. Stratified Squamous Epithelium



Characteristics of stratified squamous epithelial tissues:

It has a thick membrane made up of several cell layers. It protects the underlying tissue in areas that are open to abrasion. BY


Examples of stratified squamous epithelial tissues:

The nonkeratinized type makes the moist lining of the esophagus, mouth, and vagina. The keratinized (where keratin is deposited into cells) variety makes the epidermis of the skin which is a dry membrane. BY


6. Stratified Cuboidal Epithelium



Characteristics of stratified cuboidal epithelial tissues:

This type of epithelium is rarely found in the body. BY



Examples of stratified cuboidal epithelial tissues:
It is mostly found in the ducts of larger glands such as the sweat glands and mammary glands. There are typically two layers of this epithelium. BY


7. Stratified Columnar Epithelium



Characteristics of stratified columnar epithelial tissue:

This also isn’t usually found in the body. The only layer of the cell that is columnar is the apical* layer. BY





Examples of stratified columnar epithelial tissue:

Small amounts are found in the pharynx, the male urethra, and lining some ducts from the glands. BY


8. Transitional Epithelium



Characteristics of transitional epithelial tissues:
They have the ability to change their shape which allows more urine to flow through a tubelike organ. It allows more urine to be stored in the bladder. BY





Examples of transitional epithelial tissues:
This epithelium forms the lining of hollow urinary organs that stretch as they fill with urine. BY

Homeostasis Lab September 21

Organizational Levels Sep 14

Medical Terms September 13 (Anterior and Posterior)

Medical Terms September 13 (Anatomical Position)

Medical Terms

Homeostasis Blog 1 August 31, 2010

Homeostasis-the ability to maintain a relatively stable internal environment in an ever-changing outside world.
It is basically the body's ability to keep everything balanced including breathing, heart rate, temperature, etc.
When one part of the body responds to a stimuli, then the rest of the body follows soon after.  As in if you get a paper cut and it starts to bleed, the reaction would be for the blood at the surface of the cut to start clotting, then the heart continues to pump blood back to the whole body so basically the blood lost is getting refilled.