文档介绍：组织胚胎学课件 七年制英文医学班专用
中国医科大学
基础医学院
组胚—英文教学组
Chapter 14 Digestive gland
---small gland: fundis gland, small intestinal gland
---large gland: salivary gland, pancreas, liver
1. Salivary gland
1) General structure of exocrine gland
---Capsule: CT, which separate the parenchyma into lobules
---lobule:
① acinus:
a. serous acinus:
structure:
pyramidal or cuboidal
round basally-located N
apical: zymogen granule-acidophilic
basal: basophilic-RER, ribosome
function: secret salivary amylase
b. mucous acinus:
structure:
pale-stained, slight-blue, flattened N against the basal membrane
mucinogen granule
Golgi, RER, mitochondria
c. mixed acinus: several serous cell attached to mucous acinus – serous demilune
②duct:
intercalated duct:
simple squamous epi.
simple cuboidal epi.
connect with acinus
b. striated duct
(secretory duct): intralobule
simple columnar epi. :
tall cell, acidophilic
round N, located at apical part
longitudinal striation: plasma membrane infolding
c. interlobular duct and major duct : simple columnar epi. or pseudostratified ciliated columnar epi.
2) structural feature of each salivary gland
a.    parotid gland:
-serous
-long intercalated duct, short striated duct
b.       submandibular gland:
-mixed( mainly serous, less mucous and mixed)
-short intercalated duct, long striated duct