消化系统组织学和胚胎学PPT课件
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Cytoplasm:rich in Mitochondria, Golgi complex, SER,RER, lipid droplets, glycogen,etc.
The C.T.sends the septa into the parenchyma, separating the hepatic lobules.
The portal area is present at the corner of the lobules.
Classic hepatic lobule
The Digestive System
Exocrine gland---with duct
Constituents of multicellular gland: secretory portion: tubular,acinar or
tubuloacinar gland duct: passage of secretions
salivary glands
Parotid gland
Submandibular Sublingual
gland
gland
Acini
Pure serous gland Mixed gland, More serous acini
Mixed gland,more mixed and mucous acini
coSmmeroonusdauccitnus
Mucous acinus
Cell type
Serous cell
Mucous cell
Cytoplasm
Deep stained
Light-blue stained
Nucleus
Spherical,near the base
spindle,near the base
Salivary glands
1. components: parotid gland,submandibular
sublingual gland,etc.
gland and
2. function: secreting saliva.
The characteristics of 3 pairs of
Somatostatin—
Inhibit the secretion of other cells
Pancreas polypeptide
Diabetes: absence or inadequate amounts of
insulin.
Liver
The largest digestive gland.
Exocrine gland---without duct
Exocrine gland
Salivary gland
Acinus: mucous acinus, serous acinus ,mixed acinus
Duct: and
intercalated duct,striated duct,interlobular duct
ducts
Long I.D. ,no S.D.
Exocrine portion of pancreas
SUCCESS
THANK YOU
2020/12/30
Exocrine portion of pancreas
2. Endocrine portion (pancreas islet)
Rate(%)
It is a structural unit of liver. Components Hepatic plates: a single layer of hepatocytes arranged Sinusoids: between hepatic plates and anastomose
with each other.
Secretions
Protein
Mucoprotein (mucus)
Байду номын сангаас
Salivary gland
Serous acini
Mucous acini
Mixed acini and semilune
Semilune: several serous cells arranged like halfmoon in the mixed acinus
A cell
20%
B cell D cell
70%
5%
PP cell
5%
Distribution Periphery Center
Secretion
Glucagon-- Insulin--
Increase blood glucose levels blood glucose levels
Decrease blood glucose levels
Ducts Long I.D.
Short I.D., Long S.D.
Without I.D.
Secretion
25% saliva More salivary amylase, less mucus
70% saliva Less salivary amylase, more mucus
5% saliva Most mucus
Parotid gland---pure serous gland
Submandibular gland---mixed gland
Sublingual gland---mixed gland
Pancreas
Parenchyma: exocrine portion: pancreatic secretions involved in
Central vein: occupies the centre of the liver lobule.
hepatocyte
3 functional surfaces:sinusoidal.., canalicular.., intercellular..
LM:
Profile:large,polyhedral in shape.
digestion.
food-
secreting hormones
endocrine portion(pancreas islet):
1. Exocrine portion
acini
Consists of serous cells surr by basal lamina， Without myoepithelial cells, With several centro-acinar ce in acinus cavity.
The C.T.sends the septa into the parenchyma, separating the hepatic lobules.
The portal area is present at the corner of the lobules.
Classic hepatic lobule
The Digestive System
Exocrine gland---with duct
Constituents of multicellular gland: secretory portion: tubular,acinar or
tubuloacinar gland duct: passage of secretions
salivary glands
Parotid gland
Submandibular Sublingual
gland
gland
Acini
Pure serous gland Mixed gland, More serous acini
Mixed gland,more mixed and mucous acini
coSmmeroonusdauccitnus
Mucous acinus
Cell type
Serous cell
Mucous cell
Cytoplasm
Deep stained
Light-blue stained
Nucleus
Spherical,near the base
spindle,near the base
Salivary glands
1. components: parotid gland,submandibular
sublingual gland,etc.
gland and
2. function: secreting saliva.
The characteristics of 3 pairs of
Somatostatin—
Inhibit the secretion of other cells
Pancreas polypeptide
Diabetes: absence or inadequate amounts of
insulin.
Liver
The largest digestive gland.
Exocrine gland---without duct
Exocrine gland
Salivary gland
Acinus: mucous acinus, serous acinus ,mixed acinus
Duct: and
intercalated duct,striated duct,interlobular duct
ducts
Long I.D. ,no S.D.
Exocrine portion of pancreas
SUCCESS
THANK YOU
2020/12/30
Exocrine portion of pancreas
2. Endocrine portion (pancreas islet)
Rate(%)
It is a structural unit of liver. Components Hepatic plates: a single layer of hepatocytes arranged Sinusoids: between hepatic plates and anastomose
with each other.
Secretions
Protein
Mucoprotein (mucus)
Байду номын сангаас
Salivary gland
Serous acini
Mucous acini
Mixed acini and semilune
Semilune: several serous cells arranged like halfmoon in the mixed acinus
A cell
20%
B cell D cell
70%
5%
PP cell
5%
Distribution Periphery Center
Secretion
Glucagon-- Insulin--
Increase blood glucose levels blood glucose levels
Decrease blood glucose levels
Ducts Long I.D.
Short I.D., Long S.D.
Without I.D.
Secretion
25% saliva More salivary amylase, less mucus
70% saliva Less salivary amylase, more mucus
5% saliva Most mucus
Parotid gland---pure serous gland
Submandibular gland---mixed gland
Sublingual gland---mixed gland
Pancreas
Parenchyma: exocrine portion: pancreatic secretions involved in
Central vein: occupies the centre of the liver lobule.
hepatocyte
3 functional surfaces:sinusoidal.., canalicular.., intercellular..
LM:
Profile:large,polyhedral in shape.
digestion.
food-
secreting hormones
endocrine portion(pancreas islet):
1. Exocrine portion
acini
Consists of serous cells surr by basal lamina， Without myoepithelial cells, With several centro-acinar ce in acinus cavity.