MED
104
OSPE
Revision
Histology:
A) Epithelial
Tissue
#
1
–
Simple
Squamous
Epithelium
Identifying
Features
–
-‐
Single
layer
of
flat
cells
-‐
oval
disc
shaped
central
nuclei
Locations
–
renal
glomeruli,
renal
corpuscles,
alveoli,
lining
of
blood
&
lymph
vessels
Functions
–
filtration,
diffusion,
osmosis,
surface
covering
Notes
-‐
Notes
-‐
#2013M052
Khalid
Al
Attar
,
2
–
Stratified
Squamous
Epithelium
(Non
Keratinized)
Identifying
Features
–
-‐ multiple
layers
of
cells
-‐ Basal
cells
columnar/cuboidal
-‐ Surface
cells
are
flattened
(squamous)
-‐ Polygonal
cell
layers
just
above
basal
layer
Locations
–
-‐ found
in
areas
of
wear
and
tear
-‐ oral
cavity,
upper
esophagus,
conjunctiva,
vagina,
anus,
very
end
of
spongy
urethra,
tonsils
Functions
–
Protection,
Notes
-‐
3
–
Stratified
Squamous
Epithelium
(Keratinized)
Identifying
Features
–
-‐ multiple
layers
of
cells
-‐ Keratinized
un-‐nucleated
surface
cells
-‐ Stratum
corneum
-‐ Stratum
Lucidum
-‐ Stratum
Granulosum
-‐ Stratum
Spinosum
-‐ Stratum
Basale
(columnar/cuboidal
Locations
–
-‐ found
in
areas
of
wear
and
tear
-‐ epidermis
of
skin
Functions
–
Protection
Notes
–
surface
cells
loose
their
nuclei
&
their
cytoplasm
is
replaced
by
keratin
#2013M052
Khalid
Al
Attar
,
4
–
Simple
Cuboidal
epithelium
Identifying
Features
–
-‐ single
layer
-‐ cuboidal/rectangular
shaped
cells
-‐ large
round
central
nuclei
Locations
–
renal
tubules,
renal
collecting
ducts,
ducts
of
glands
,
ovarian
epithelium,
thyroid
follicles
Functions
–
secretion
&
absorption
Notes
-‐
5
–
Stratified
Cuboidal
epithelium
Identifying
Features
–
-‐ multiple
layers
-‐ cuboidal/rectangular
shaped
cells
-‐ large
round
central
nuclei
Locations
–
lines
the
LARGEST
ducts
of
sweat
glands,
mammory
glands,
salivary
glands
&
pancreas
Functions
–
protection
Notes
-‐
#2013M052
Khalid
Al
Attar
, 6
-‐
Simple
Columnar
epithelium
(Non
Ciliated)
Identifying
Features
–
-‐ single
layer
-‐ column
shaped
cells
-‐ round/oval
nucleus
-‐ GOBLET
CELLS
-‐ Microvilli
(small
intestine)
Locations
–
lines
GIT
(stromach
-‐>
anal
canal)
-‐ gall
bladder
-‐ parts
of
uterus
&
uterine
tubes
-‐ excretory
ducts
of
some
glands
Functions
–
protection,
absorption,
secretion
(not
movement?)
Notes
–
-‐ goblet
cells
secrete
mucous
that
protects
the
cell
lining
from
the
acidic
environment
in
the
lumean
of
the
organ
-‐ small
intestine
have
microvilli
-‐ the
cells
long
axis
is
perpendicular
to
the
basal
lamina
-‐ micro
villi
for
increased
surface
area
&
absorption
-‐ does
only
non
ciliated
have
GOLBET?
7-‐
Simple
Columnar
(Ciliated)
Identifying
Features
–
-‐ Single
layer
-‐ Column
shaped
cells
-‐ Oval/round
nucleus
-‐ CILLIA
(at
apical
surface)
Locations
–
small
bronchi,
uterine
tubes,
portion
of
uterus
Functions
–
absorption
secretion
protection
(not
movement?)
Notes
–
-‐ cilla
are
motile
structures
on
epical
surface
-‐ increase
cell
surface
area
-‐ facilitate
movement
of
molecules
in
and
out
of
cells
-‐ absorption
-‐
#2013M052
Khalid
Al
Attar
104
OSPE
Revision
Histology:
A) Epithelial
Tissue
#
1
–
Simple
Squamous
Epithelium
Identifying
Features
–
-‐
Single
layer
of
flat
cells
-‐
oval
disc
shaped
central
nuclei
Locations
–
renal
glomeruli,
renal
corpuscles,
alveoli,
lining
of
blood
&
lymph
vessels
Functions
–
filtration,
diffusion,
osmosis,
surface
covering
Notes
-‐
Notes
-‐
#2013M052
Khalid
Al
Attar
,
2
–
Stratified
Squamous
Epithelium
(Non
Keratinized)
Identifying
Features
–
-‐ multiple
layers
of
cells
-‐ Basal
cells
columnar/cuboidal
-‐ Surface
cells
are
flattened
(squamous)
-‐ Polygonal
cell
layers
just
above
basal
layer
Locations
–
-‐ found
in
areas
of
wear
and
tear
-‐ oral
cavity,
upper
esophagus,
conjunctiva,
vagina,
anus,
very
end
of
spongy
urethra,
tonsils
Functions
–
Protection,
Notes
-‐
3
–
Stratified
Squamous
Epithelium
(Keratinized)
Identifying
Features
–
-‐ multiple
layers
of
cells
-‐ Keratinized
un-‐nucleated
surface
cells
-‐ Stratum
corneum
-‐ Stratum
Lucidum
-‐ Stratum
Granulosum
-‐ Stratum
Spinosum
-‐ Stratum
Basale
(columnar/cuboidal
Locations
–
-‐ found
in
areas
of
wear
and
tear
-‐ epidermis
of
skin
Functions
–
Protection
Notes
–
surface
cells
loose
their
nuclei
&
their
cytoplasm
is
replaced
by
keratin
#2013M052
Khalid
Al
Attar
,
4
–
Simple
Cuboidal
epithelium
Identifying
Features
–
-‐ single
layer
-‐ cuboidal/rectangular
shaped
cells
-‐ large
round
central
nuclei
Locations
–
renal
tubules,
renal
collecting
ducts,
ducts
of
glands
,
ovarian
epithelium,
thyroid
follicles
Functions
–
secretion
&
absorption
Notes
-‐
5
–
Stratified
Cuboidal
epithelium
Identifying
Features
–
-‐ multiple
layers
-‐ cuboidal/rectangular
shaped
cells
-‐ large
round
central
nuclei
Locations
–
lines
the
LARGEST
ducts
of
sweat
glands,
mammory
glands,
salivary
glands
&
pancreas
Functions
–
protection
Notes
-‐
#2013M052
Khalid
Al
Attar
, 6
-‐
Simple
Columnar
epithelium
(Non
Ciliated)
Identifying
Features
–
-‐ single
layer
-‐ column
shaped
cells
-‐ round/oval
nucleus
-‐ GOBLET
CELLS
-‐ Microvilli
(small
intestine)
Locations
–
lines
GIT
(stromach
-‐>
anal
canal)
-‐ gall
bladder
-‐ parts
of
uterus
&
uterine
tubes
-‐ excretory
ducts
of
some
glands
Functions
–
protection,
absorption,
secretion
(not
movement?)
Notes
–
-‐ goblet
cells
secrete
mucous
that
protects
the
cell
lining
from
the
acidic
environment
in
the
lumean
of
the
organ
-‐ small
intestine
have
microvilli
-‐ the
cells
long
axis
is
perpendicular
to
the
basal
lamina
-‐ micro
villi
for
increased
surface
area
&
absorption
-‐ does
only
non
ciliated
have
GOLBET?
7-‐
Simple
Columnar
(Ciliated)
Identifying
Features
–
-‐ Single
layer
-‐ Column
shaped
cells
-‐ Oval/round
nucleus
-‐ CILLIA
(at
apical
surface)
Locations
–
small
bronchi,
uterine
tubes,
portion
of
uterus
Functions
–
absorption
secretion
protection
(not
movement?)
Notes
–
-‐ cilla
are
motile
structures
on
epical
surface
-‐ increase
cell
surface
area
-‐ facilitate
movement
of
molecules
in
and
out
of
cells
-‐ absorption
-‐
#2013M052
Khalid
Al
Attar
