Tissue Level of Organisation Flashcards
what a re the 4 kinds of tissue that make up the body?
epethilium, connective, muscle and nervous
epithelial tissue includes what?
epithelial and glands
what does epithelial cover?
exposed surfaces
lines internal passageways
what do glands do?
they are secreatory structures
what are the two kinds of glands?
endocrine and exocrine
what is the difference between the endocrine gland and the exocrine gland?
the endocrine galnd is secreated into the bloodstream
exocrine glands secreate to the external surfaces
what is the aim of epithelium?
to protect and control permeability, provide sensations and produce specialised secreations
what are the three kinds of epithelial cells?
cuboidal
squamous
culumnar
what is the difference between simple and stratisfied layers of epithelium?
simple is single layer stratisfied is multipule layer
what are the kinds of junctions?
tight junctions
adhesion belts
gap junctions
desmesomes
what are the two layers of the basement membrane?
basal laminate
reticular lamina
what attaches the epithelium to the basement membrane?
hemidesmesomes
true or false epithelial tissue is avascular?
true
what does simple squamous cells look like?
irregularly shaped puzzle pieces
where can simple squamous cells be found?
in passageways and arias of absorbtion
how can simple squamous epithelium be separated?
mesothelium
endothelium
what a re the two kinds of stratisfied squamous epethilium?
keratenaized
non keratinized
what does cuboidal cells look like?
cubes
where is simple cuboidal epithelium found?
absorbtion occurs
eg. kidney tubules or where secreations happen thyroid gland
what are transitional epethelium?
unusual stratisfied epethelium
allows for stretching
found in the urinary bladder
what does culumnar epethelium look like?
columns
where can simple columnar epethelium be found?
where absorbtion and secreations takes place
eg. small intestine, gall bladder and stomach
Psoudostratisphied coloumnar epethelium is often found in the…
air passageways and nasal cavity
where is stratisfied culumnar epethelium found?
rare and found in ducts
eg. saliva glands
what are the three processes to secreate fluid onto a epethelial surface?
merocrine secreations
a pro rinse secreations
holocene secreations
how do merocrine secreations work?
exocytosis
what is involved with aprocrine secreations?
loss of secreatory product and cytoplasm
what happens with holocene secreations?
become packed with secreations then burst
word association for merocrine secreations?
mero= mucus vesicles with water
word association for aprocrine?
apocrine= apop off cytoplasm
word association for holocene secreations?
holo- holocaust= burst kill the cell
what ar sthe variations of the simple glands?
simple tubular simple coiled tubular simple branches tubular simple alveolar simple branched alveolar
what a re the variations of the compound glands?
compound tubular
compound alveolar
compound tubularalveolar
