Internal surfaces Flashcards
What is a mucous membrane?
Epithelia lining the lumen of a tube (That opens to the exterior)
Layer of connective tissue called lamina propria
What is a serous membrane?
2 part membrane that lines closed body cavity (epithelium and connective tissue layer)
What does serous membranes line?
Peritoneum
Pleural sacs
Pericardium
What epithelia does the Ectoderm develop into?
Epidermis of skin
Corneal epithelium of eye
What epithelia does the Mesoderm develop into?
Epithelium or Urogenital tract
Blood vessel lining
Serous membrane sacs
What epithelia does the Endoderm develop into?
Epithelia of respiratory tract
GI tract
Liver
Glands
What is the Basement membrane?
Thin layer between epithelia and connective tissue
Where can you find simple squamous epithelia?
Blood and lymph vessel linings
Alveoli
Bowman’s capsule
Loop of Henle
What is the function of simple squamous epithelia?
Lubrication
Gas exchange
Barrier
Where can you find simple cuboidal epithelia?
Thyroid follicles
Small ducts of exocrine glands
Kidney tubules
What is the function of Simple cuboidal epithelia?
Absorption
Secretion
Barrier
Hormone synthesis and storage
Where can you find simple columnar epithelia?
Stomach lining
Small intestine & colon
Uterus
What is the function of simple columnar epithelia?
Absorption
Secretion
Lubrication
Transport
Where can you find Pseudostratified epithelium?
Lining of nasal cavity
Trachea
Bronchi
Lacrimal sac
What is the function of Pseudostratified epithelium?
Secretion
Absorption
Mucus secretion
Particle trapping & removal
Where can you find stratified squamous non keratinized epithelium?
Oral cavity
Vagina
Surface of cornea
What is the function of stratified squamous non keratinized epithelium?
Protect against abrasion
Reduces water loss, but stays moist
Where can you find stratified squamous keratinized epithelium?
Surface of the skin
Little in the oral cavity
What is the function of stratified squamous keratinized epithelium?
Protect against trauma
Prevents water loss
Prevents microbes
Protects against UV
Where can you find transitional epithelium?
Ureter
Urethra
Bladder
What is the function of transitional epithelium?
Distensibility
Protect of underlying tissue from underlying tissue
Where can you find simple columnar epithelium with microvilli?
Intestine
What is the function of simple columnar epithelium with microvilli?
Increases surface area for absorption
