Session 6: Epithelial Tissues Flashcards
What is a mucous membrane?
Epithelium which lines internal tubes which open to the exterior.
Name 3 tracts which are lined by a mucosal membrane.
- Alimentary Tract
- Urinary Tract
- Respiratory Tract
What are the layers of a mucous membrane?
- Epithelial layer
- Lamina propia (CT)
- Muscularis mucosa (smooth muscle ONLY IN ALIMENTARY TRACT)
What is a serous membrane?
A thin, 2 layered membrane which lines certain closed cavities within the body.
Name three serous membranes.
- Peritoneum
- Plural sacs
- Pericardium sacs
What layers does serous membrane consist of?
- Simple squamous epithelium (MESOTHELIUM)
2. thin layer of CT
Define basement membrane.
Thin, flexiable, acellular layer between epithelium and CT
Name 3 locations of simple squamous.
- Lining of vessels/ body cavities
- Bowmans capsule (kidney)
- Alveoli
Name 3 locations of simple cuboidal.
- Kidney tubules
- Thyroid
- Ovaries
Name a 3 locations of simple columnar.
- Small intestine (microvilli)
- Colon
- Stomach
Name a location of pseudo-stratified epithelium.
URT
Name 3 locations of stratified squamous.
- Where ever you can put you ** in
2. Inner Eye lid
Name a location of keratinised stratified squamous.
Epidermis
Name the 4 layers of the epidermis.
- Horny layer
- Granular layer
- Prickle cell layer
- Basal layer
What occurs in the basal layer of the epidermis?
Keratinocytes divide by mitosis
What occurs in the prickle cell layer of the epidermis?
Keratinocytes loose their ability to divide
What occurs in the granular layer of the epidermis?
- keratinocytes loose their plasma membranes
- differentiate into corneocytes
What is horny layer of the epidermis made of?
Flattened Corneocytes
Which layer of the epidermis are melanocytes found?
Basal layer
Where do melanocytes originate from?
Neural crest
What is the function of melanocytes?
Produce melanin (more pigment is produced in black people)
Where do langerhan cells originate?
Bone marrow
Which layer of the epidermis are langerhan cells found?
Prickle cell layer
What is the function of langerhan cells?
Present antigens to T lymphocytes
Name a location of transitional epithelium.
Bladder
