Digestive gland
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Transcript of Digestive gland
The extrinsic glands of the digestive system i
nclude the major salivary glands, the pancreas, a
nd the liver, all of which are located outside the
wall of the digestive tract.
The major salivary glands consist of three pai
r of glands: the parotid, submandibular glands an
d sublingual glands.
The pancreas can be divided into two portion:
exocrine portion and endocrine portion. The exocri
ne portion is a serous, compound tubloacinar gland.
The endocrine portion is called pancreatic islet( is
let of Langerhans).
Fig . 9 A cell of pancreatic islet (TEM) nucleus secretory granule① ②
The cells secrete glucagon.
①
②
The liver is the biggest gland in the body. It c
an be divided into two main parts: hepatic lobule
and portal area.
The hepatic lobule includes five components :
central vein, hepatic plate(cord), hepatic sinusoid,
perisinusoidal space and bile canaliculi.
Fig. 13 Portal area of liver(HE stain , high mag.)
①interlobular artery interlobular vein interlobular bile duct② ③
①
② ③
Hepatic macrophage
Fig. 15 Liver of mouse (trypan blue injected preparation, high mag.)
Hepatic macrophage