A&P - Chapter 9 (Part 2) Flashcards
What are the different types of epithelium? (5)
- Simple squamous epithelium
- Stratified squamous epithelium
- Simple columnar epithelium
- Stratified transitional epithelium
- Pseudostratified epithelium
How many layers are there in simple squamous epithelium?
1
- flat scaled shaped cells
What is simple squamous epithelium good for? (3)
- Transport
- Diffusion
- Absorption
Is simple squamous epithelium permeable?
Yes
- to many structures
Where is simple squamous epithelium located? (4)
- Alveoli of the lungs
- Lining of blood
- Lining of lymphatic vessels
- Skin
How many layers are there in simple cuboidal epithelium?
1
What does simple cuboidal epithelium specialize in?
Secretory activity
What are simple cuboidal epithelium usually grouped into? (2)
- Tubules
2. Clusters/glands
What 2 things can glands be?
- Endocrine
- ductless - Exocrine
- ducts
What do tubules of the kidney produce?
Urine
How many layers do simple columnar epithelium have?
1
- tall, narrow, column shaped
What do the simple columnar epithelium compose? (4)
Surfaces of the …
- Mucous membranes that line the stomach
- Intestines
- Parts of the respiratory system
- Parts of the reproductive system
What do simple columnar epithelium contain?
Mucous
What does the mucous from the simple columnar epithelium produce?
Goblet cells
What is the simple columnar epithelium specialized for?
Absorption
What is an example of a structure that is specialized for absorption for simple columnar epithelium?
Microvilli
What does pseudostratified columnar epithelium look like?
Columnar cells of varying heights
- all touching the basement membrane
What does the pseudostratified columnar epithelium line? (2)
- Respiratory tract
2. Parts of the reproductive system
How does stratified squamous epithelium look?
Several layers closely packed
What is the primary function of stratified squamous epithelium?
Protection
What does the stratified squamous epithelium protect?
Prevents microbes from getting through the skin or mucus membranes
Can stratified squamous epithelium be keratinized?
Yes
- depending on the location
- eg) skin vs mouth/esophagus/vagina
Where do you mainly see stratified squamous epithelium?
In the skin
What layers of the stratified squamous epithelium are attached to the basement membrane?
Just the first layer
- the rest are layered on top
What does stratified cuboidal epithelium look like?
Two or more rows of cuboidal cells, arranged randomly over a basement membrane
What is the function of the stratified cuboidal epithelium?
Protection
Where is the stratified cuboidal epithelium located? (3)
- Sweat glands
- Pharynx
- Epiglottis
How many layers does the stratified columnar epithelium have?
Multiple
What do the cells look like in stratified columnar epithelium?
Columns
- but only the most superficial cells are typically in shape
What is the function of the stratified columnar epithelium?
Protection
Out of all the tissues, which one is the most rare?
Stratified columnar epithelium
Where is the stratified columnar epithelium located? (2)
- Male urethra
2. Near the anus
Why isnt stratified columnar epithelium in female urethras?
They need to be able to stretch in males
- change directions
How many layers are there in stratified transitional epithelium?
Up to 10 layers
What is the shape of stratified transitional epithelium?
Roughly cuboidal-shaped cells that distort to squamous shape when stretched
What is the function of stratified transitional epithelium?
Protection
Where is stratified transitional epithelium located?
Found in body areas subject to stress and that stretch
- eg) urinary bladder
