Epithelium Flashcards
(26 cards)
Where do you find epithelial tissues?
form the covering of all body surfaces, line body cavities and hollow organs, and are the major tissue in glands.
Where can epithelial tissues be found?
Outer layer of skin (epidermis)
Digestive system
Respiratory
Cardiovascular
What is the function of epithelial tissues?
Barrier function (protection e.g. skin, oral cavity), secretion, absorption, excretion, filtration, diffusion, sensory reception.
what are common features to all epithelial tissues?
- Arranged as continuous sheets
- tightly bound cells
What type of epithelium tissue can be keratinised?
Stratified squamous epithelium
Ker
What does keratinised mean?
having changed into, or changed so as to contain, keratin
Where in the mouth can you find keratinised stratified squamous epithelium
gingiva, parts of tongue and hard palate.
What happens when you have ulceration in the mouth?
break in the continuity of epithelium
What has happen to have oral squamous cell carcinoma?
Dysplasia epithelial cells proliferate uncontrollably.
What modified cell does columnar epithelial have?
Goblet cells
What is the function of Goblet cells?
Synthesis and secret mucous
Where are goblet cells found?
Respiratory, gastro-intestinal and reproductive tract.
what is the role of microvilli?
increase surface area allow for more absorption/secretion
what is the role of cilia?
move together to sweep dust and mucous
Describe the characteristics of Bronchitis?
Inflammation of brachial tubes. Increased number of mucous glands in the bronchial walls.
what type of epithelium is found in the small intestine?
simple columnar
what type of epithelium is found in lung capillaries?
simple squamous
stratified squamous epithelial
what type of epithelium is found in the oral mucosa?
stratified squamous epithelium (some areas are keratinised for protection)
The epithelial membrane that lines the body cavities that are exposed to the outside of the body is called a __________ membrane.
mucous
What type of gland is being described? Part of the actual cell breaks away in order to release its products.
Apocrine
The epithelial membrane that surrounds the heart and lungs separately is called a __________ membrane.
Serous
The epithelium that lines the central canal in the spinal cord helps move cerebrospinal fluid.
To which of the following types does this epithelium most likely belong?
A - Simple squamous
B - stratified squamous
C - Simple columnar
D - Glandular epithelium
Simple Columnar
Which epithelium participates in functions like the diffusion of nutrients from the blood to the body tissues and the diffusion of gases in the alveoli of the lungs?
Squamous epithelium: The simple squamous epithelium consists of a single layer of flat cells. It is easy for substances, like nutrients and gases, to diffuse through these flat cells.
