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Lecture

ANAT 261 Lecture Notes - Hepatocyte


Department
Anatomy & Cell Biology
Course Code
ANAT 261
Professor
Jason Young

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Lab 10 – Salivary Glands, Pancreas and Liver
Classification of Glands
- Fate of secretion:
oEndocrine no duct; secretion into surrounding tissue or
blood system (ex. Islets of Langerhans of pancreas)
oExocrine delivered through duct to lumen/surface (ex.
sweat glands)
oParacrine acts on neighbouring cell
- Structure of secretory portion:
oTubular tube-shaped (ex. sweat gland)
oAcinar round clusters (ex. salivary gland)
- Structure of excretory portion or duct:
oSimple one glandular unit per duct
oCompound several glandular units per duct
- Manner of secretion:
oHolocrine cells die; everything secreted (ex. sebaceous
glands)
oMerocrine cells unaffected; only secretory products
released (ex. sweat glands)
oApocrine some cell mass loss (ex. mammary glands)
GLANDS:
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Lab 10 – Salivary Glands, Pancreas and Liver
SEROUS MUCOUS
Lu
men
Small Larger
Cel
ls
Tall and pyramidal
*Base of cell is basophilic
Pyramidal
Nu
clei
Basally located FLAT and basally located
Apex filled with zymogen
granules –
eosinophilic/acidophilic
filled with mucinogen
droplets -
(don’t stain well)
*Serous demi-lunes = portions of serous cells in a seromucous gland
INTRALOBAR DUCTS:
INTERCALATED STRIATED
C
e
l
l
s
Simple squamous or
cuboidal
Simple cuboidal or
columnar cells
S
i
z
e
Very small (slightly
bigger than capillary)
Larger
N
u
c
l
e
i
Large, round & fill most
of the cell
Doesn’t take up whole
cell
E
m
p
t
y
i
n
t
o
Striated ducts Interlobular ducts
O
t
h
e
r
Striations @ base
from mitochondria
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