Tissues Flashcards
Histology:
Systematic study of tissue types
Pathology:
Study of causes and effects of diseases
Main tool is Hematoxylin and Eosin stain (H&E):
- Nuclei- Blue
- Cytoplasm- Red
Epithelium Function
Covering
Lining
Glandular
What is Epithelium Classified by?
Arrangement
Morphology
Epithelium Blood supply:
Avascular (no blood supply) –sits on basement membrane which aids in nutrient and waste exchange
What are the 2 types of glandular in the Epithelium and their functions:
Exocrine:Secrete substances into ducts which empty onto epithelial surfaces
Endocrine: Secrete substances that diffuse into bloodstream (no ducts)
Simple meaning:
One layer of cells
Stratified meaning:
More than one layer of cells
Squamous meaning:
Cells are wider than tall (plate-like) – “squashed”
Cuboidal meaning:
Cuboidal—cells are as wide as tall, like cubes
Columnar meaning:
Columnar—cells are taller than they are wide, like columns
Simple squamous Epithelium Location and function:
Function: diffusion & filtration
Location: kidney glomeruli, blood vessels, lymphatic vessels
Simple Cuboidal Epithelium Location and function:
Function: secretion & absorption
Location: Kidney tubules
Simple columnar Epithelium Location and function:
Function: absorption & secretion
Location: Stomach, intestines, gallbladder, uterus
Pseudo-stratified columnar Epithelium Location and function:
Function: secretion
Location: trachea
Stratified squamous Epithelium Location and function:
Function: protection
Location: esophagus, mouth, urethra, epidermis
Stratified Cuboidal Epithelium Location and function:
Function: protection
Location: largest ducts if sweat glands, mammary glands, salivary glands
Stratified Columnar Epithelium Location and function:
Function: protection & secretion
Location: male urethra