Milena Velba Freevidea

salivary glands Gallbladder and Liver



HEX100. Salivary gland parenchyma showing the homogeneous and where in this expansion are acinar duct units.
abundant adipose tissue is observed.



HEX400. Gland parenchyma showing excretory salivary ducts lined by stratified cuboidal epithelium. The remaining acinar structural supports are units showing excretory cells strongly basophilic cytoplasm.



HEX400. Details of the salivary gland parenchyma showing the excretory ducts.



HEX100. Salivary gland parenchyma showing the abundance of adipose tissue in some areas.

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The gastrointestinal tract is a long tube, with significant associated glands, and its function is the transformation of the complex molecules of food into simpler substances and readily usable by the body. Simple nutritious
These compounds are absorbed by the intestinal villi lining the small intestine. So, enter the blood and nourish every cell in the body.
From the mouth to the anus, the digestive tract is about eleven meters in length. The gastrointestinal tract continues through the large intestine, from just over five feet in length. His final portion is the rectum, which ends at the anus, where are evacuated outside the indigestible remains of food.

Histological structure of the tube
digestive tract and accessory glands (salivary glands, liver and pancreas), form the digestive tract. However the pancreas by an endocrine gland also be addressed on that page. (Endocrine glands).
Histologically consists of four concentric layers that are inside out:
inner layer or mucosa (which can be found mucus-secreting glands and HCl lymphatic vessels and some lymph nodes and lamina propria). Includes an inner muscular layer or muscularis mucosae
submucosa layer composed of loose connective tissue. Submucosa layer contains the so-called Meissner's submucosal plexus, which is a component of the enteric nervous system.
muscular layer consisting of a layer of smooth muscle (except in the esophagus, where striated muscle).
Inside is another component of the enteric nervous system, myenteric plexus of Auerbach
Serosa or adventitia layer . Is named after the region of the gut lining, as if intraperitoneal serosa or adventitia if retroperitoneal. The adventitia consists of loose connective tissue.
submucosal and myenteric plexuses constitute the enteric nervous system that is distributed throughout the gastrointestinal tract from the esophagus to the anus. Below the diaphragm, there is a fourth layer called the serosa, formed by the peritoneum.
The wall thickness varies by anatomical site, as well as the surface can be smooth or not.
The epithelium may occur is a plane or a multilevel cornified no simple prismatic microvilli.
In the crypts of the mucous glands flowing.
These can be of the mucosa or submucosa. Meanwhile, a villus is the constant upheaval of the mucosa.
If the fold is accompanied by the submucosa, then the folding of the submucosa.
The fold is called the submucosa valve Kerckring conniving or fold.
conniving valve can maintain the presence of villi.

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Stomach. HEX400 antrum. Gastric antral mucosa where you can see the lining of columnar type and mark the yellow arrow.
of underlying Alunas is even observe antral glands and the lamina propria mucosa underlying such


Antro. HEX400. Antral glands showing predominantly mucoid aspect, although it is observed some serous aspect. The lamina propria is made up of loose connective tissue.


Fund. HEX400. Fundus glands showing predominantly looks intense and slightly acidophilic granules. The lamina propria is low due to low tissue and glandular grouping, this fabric is made up of loose connective tissue.


HEX400. Gastric muscle layer made up of smooth muscle tissue. This way you are intertwined with oval or fusiform nuclei strongly basophilic. In the left image shows a peripheral nerve dicurre this muscle tissue.


HEX400. Another detail of the gastric muscle layer made up of smooth muscle tissue. This tissue forms you are intertwined with oval or spindle nuclei and strongly basophilic. In this image on the right and bottom artery was observed. This tissue is in the transition zone subserosal muscle tissue and hence the muscle fibers give the appearance of being farther apart.

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Esophagus Stomach

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HEX100. View revstimiento epithelium stratified squamous esophageal without keratin. Subepithelial tissue contains some lymphoid appends some mucous glands

HEX40. This expansion is observed and described the epithelium with subepithelial lymphoid appends and abundant vascularization in subepithelial area. At the top of the image shows striated muscle tissue.


HEX400. Non-keratinized stratified squamous epithelium where mostly appreciate the stratum corneum. Alcorta Because we do not see the granular layer, but if on top shows the basal cell layer and basement membrane focally in the upper right.


HEX40. Another detail of the esophageal epithelium. excel in the subepithelial tissue the presence of scattered lymphocytes.


HEX400. Epithelium keratinized stratified squamous not appreciate the stratum corneum where majority. We see the granular layer marked by the yellow arrow.


HEX400. Another detail of the epithelium, basal cells marked by the arrow beneath the basement membrane of the epithelium lining


HEX40. General appearance of the esophagus showing a highly vascular tissue sibepitelial (arrow), with numerous lymphoid aggregates.

HEX40. Details of the esophagus where there is a dilated blood vessel in the subepithelial tissue, scattered lymphoid aggregates. This is loose connective tissue and at the bottom we see the presence of smooth muscle.


HEX40. More details of the subepithelial area with loose connective tissue with lymphocytes and a mucoid glánduls area, appends lymphoid and blood vessels, all own in this area.


HEX400. Detail of the epithelium lining the subepithelial lymphoid appends at high magnification.

MORE IMAGES OF ESOPHAGUS IN THE LINK:
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HE X 100. Gallbladder wall where you notice the presence of smooth muscle, adipose tissue and the presence of an artery with thickened wall in the area very central.



HEX100. Epithelium lining the gallbladder columnar type in the top of the image, looking like some kind spongiform and co sanguíenos vessels dilated. at the bottom we see the muscular layer composed of smooth muscle cells.


HEX40. Homogeneous liver parenchyma was observed in the central area the presence of a portal space. Observed in peripheral areas of the image, the presence of veins centrolulares.


HEX40. Homogeneous liver parenchyma peripherally covered by the capsule (left image), the capsule of Glisson.
In this capsule are some nerve endings and blood vessels.


HEX400. Liver parenchyma represents a space Port is a dilated vein (the largest), an arteriole located in the periphery and retail obeva its enlarged muscular wall (in this expansion can not just watch) and if you look at top left beside partywhich vein the presence of bile duct.




HEX400. Liver parenchyma represented by hepatocytes. These cells are well-defined cell boundaries (cell membranes) and a basophilic cytoplasm and lumpy. The cores are cromaina punctate and presence of nucleoli.



HEX400. Liver parenchyma backward by Glisson's capsule in which we appreciate a small artery and peripheral nerve. Underlying see the space capsule and the subcapsular liver parenchyma represented by hepatocytes as described in the previous image. Some cells have vacuolated cytoplasm.


HEX400. Homogeneous liver parenchyma was observed in the central area the presence of a portal space. dilated vein is observed in the bottom of the branch and the artery and stuck to it and to the right of the image the bile duct which is coated by a simple cuboidal epithelium.


HEX100. Image corresponding to a histological section taken at the level of the portal vein in the liver and periphery where one can see the enlarged vein in the bottom of the image.
in the hepatic artery Supeior see its light (lumen) dilated congesivo (hematic material). The other is parenchymal tissue and there were numerous blood vessels and peripheral nerves.

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Small intestine (duodenum and ileum)

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HEX400.
Mucosa of the small intestine where it is represented by glands revealed the presence of goblet cells.


HEX400. Another
also showing the small intestinal mucosa represented glands where it is observed by the presence of goblet cells. A d ela left image shows the muscularis mucosae.


HEX400.
also Another detail showing the small intestinal mucosa represented by glands where it is observed the presence of some cells more eosinophilic cytoplasm (arrow) are Paneth cells and the remaining goblet cells. To the left of the image shows the thin muscularis mucosae with some small capillaries.


HEX400. Detail showing
mucosa also represented by the small intestine mucosa epithelium lining the villi aspect.


HEX400.
Another detail showing this aspect, that villous epithelium consisting of a simple showing intermittently such goblet cells.


HEX400. Another detail of another
cmpo villous showing this aspect, that consisting of a simple epithelium showing intermittently such goblet cells.



HEX400.
Another detail showing a different field that aspect, that villous epithelium consisting of a simple showing intermittently such goblet cells.


HEX100.
mucosa seen here with their glands and lamina propria and submucosa of loose appearance (Connective tissue fibroblasts). There is a lymphoid aggregate.

More pictures at the link:
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