EXAM 2 Flashcards
Histology
The study of tissue
tissue
a group of cells that are similar in structure and perform a common related function
Epithelial Tissue
found throughout the body- covers the body surface and organs
forms the inner lining of the body cavities and lines hollow organs
can cancer cells dissolve the basement membrane f epithelial tissue?
yes
what type of cell junction is found in epithelial tissue?
Tight junctions and desmosomes
is epithelial tissue vascular?
No it is avascular but innervated- lack of blood vessels- nourished by diffusion but has nerves
Cane the cells of epithelial regenerate themselves?
yes cells in this tissue divide
What are the functions of epithelial tissue?
- Protection- skin, digestive tract lining
- excretion-sweat from sweat glands
- absorption-nutrient uptake in small intestine, diffusion, filtration
- secretion-hormones, mucous, enzymes
How do epithelial tissues get their names?
First word- indicates the number of cells
second word- indicates the shape of the cells
simple epithelial
single layer of cells
stratified epithelial
two or more layers of cells- shape of cells can change in different layers
PSUDOSTRATIFIED epithelia
single layer of cells that look layered
transitional epithelia
transitions between one shape to another
squamous
oval/flat
cuboidal
square/hexagon like
columnar
tall/rectangular
Connective tissue
is prevalent in the body, its amount in particular organs varies.
characteristics of connective tissue
-most widely distributed type of tissue
Functions of connective tissue
- Movement
- insulation
- supports other tissues
- storage
- protects vital organs
- attachment of tissues/organs
- transports
- immunity
what type of connective tissue is involved in movement
cartilage
what type of connective tissue is involved in insulation
Adipose
what type of connective tissue is involved in supporting other tissues?
dense irregular and regular connective tissue and cartilage
what type of connective tissue is involved in storage
Adipose and bone
what type of connective tissue is involved in protecting vital organs?
bone, dense irregular connective tissue