Anatomy Chapter 4 Flashcards
what are the main tissues found in the body?
Epithelial
connective
muscle
nueral
A group of similar cells specialized to perform a specific function are?
Tissues
what do Epithelial tissues do?
cover surfaces
line spaces/ passageways
form glands - produce specialized secretions
control permeability
what do connective tissues do?
- fill internal spaces
2 support other tissues - transport materials
- store lipids
Where are Muscle tissues found?
skeletal muscles
heart
wall of various hollow/tubular organs
where are neural tissues found?
brain
spinal cord
nerves
Epithelial cells are often connected to a basement membrane so they exhibit ____.
Polarity
the surface of the cell connected to the basement membrane is called what?
basil surface
surface of epithelial cell that isnt connected to the basement membrane is called what?
apical surface
T/F : Epithelial cells can regenerate
T
T/F : epithelial cell have a large blood supply
F: they lack blood supply
- how are epithelial tissues packed?
2. do they have a lot or little extracellular membrane?
- mostly tightly packed
2. they have little extracellular material
how are Epithelial cells classified?
by cell shape and layering
what are the three cell shapes of epithelial tissues?
Squamous
cuboidal
columnar
what are the classifications of layering for epithelial cells?
simple
stratified
pseudostratified
describe simple layering
one layer of connected cells
describe stratified layering
2 or more layers of connected cells
describe Pseudostratified
inbetween simple and stratified (hard to tell)
describe squamous
scale-like cells
look like fried eggs
flat
nucleus “on top” of the cell
describe cuboidal cells
cube shaped
nucleus in the middle of cell
describe columnar
column shaped cells
nucleus toward the “bottom” of the cell
usually ciliated
where can you find Simple squamous epithelial tissues? and what is their function
- minimal stress areas
- alveoli, blood vessels, heart chambers, inner lining of cornea - allows for rapid diffusion, filtration, secretion, protection, reduces friction
where can you find Simple cuboidal epithelial tissues? and what are their function?
- lining of some ducts, intestins, kidneys tubules, exocrine glands, ovary surfaces
- absorption, protection and secretion
where can you find Simple columnar epithelial tissues? what are its functions?
- lining of uterine tract, lining of stomach, intestines, gallbladder, collecting ducts of kidneys
- protection, secretion, absorption
describe Stratified squamous, Keratinized cells
many layers
surface cells are dead, flat, and filled with the protein keratin
Describe stratified squamous, nonkeratinized
many layers
no keratin in cells
surface layer alive, flat and moist
where can you find Stratified squamous, keratinized epithelial tissues? what are its functions?
- dermis of the skin
2. protection of underlying tissue
where can you find Stratified squamous, nonkeratinized epithelial tissues? what are its functions?
- lining of oral cavity, part of pharynx, esophagus, vagina, anus
- protection of underlying tissue
where can you find Stratified cuboidal epithelial tissues? what are its functions?
- found in large ducts in most exocrine glands, in male urethra
- protection, secretion
where can you find Stratified columnar epithelial tissues? what are its functions?
- Rare, some ducts of exocrine glands, in some regions of male urethra
- protection, secretion
where can you find Pseudostratified columnar epithelial tissues? what are its functions?
- in most respiratory tract, nasal cavity lining, pharynx, trachea, bronchi
* * non- ciliated is rare
where can you find Transitional Epithelium epithelial tissues? what are its functions?
- lining of urinary bladder, ureters, part of urethra
2. distention, relaxation to accommodate urine volume changes
what is the function of Mesenchyme tissue? where is it found?
- common origin for all other connective tissue types
2. throughout the body of the embryo, fetus, adult (amnion)
what is the function of Mucous Connective tissue? where is it found?
- support of structures in umbilical cord attaching fetus to mother
- umbilical cord of fetus
a collection of epithelial tissues that produce a secretion are called what?
Glands
a gland that release secretion into internal fluid (no ducts used) is called?
endocrine gland
A gland that releases secretion via ducts (tubular passageways) onto the surface of an epithelial tissue is called what?
Exocrine gland
name the three types of exocrine glands
serous
mucous
mixed gland