Digestive System – Small and Large Intestines

Tip of a villus from the jejunum of a dog. There is some separation artifact at the junction between the

Cental lacteal in the core of a villus. The lacteal is part a blind-ended lymphatic vessel and is involved in

In the dog, the glands of the anal sac (sinus paranales) are large aprocrine sweat glands. They are prone to

This low magnification micrograph shows the anal canal area of a dog. A variety of glands are included here but

Glands of the anal sac from a dog. PK1636. J11a. H&E. Original mag. 10x. Anal sac. Glands of anal sac.

Recto-anal junction in the dog. The rectal area is covered by colonic mucosa. The anal canal is covered by stratified

The epithelium of the GI tract is replaced on a regular basis. In the intestine mitosis takes place in the

Villi from the jejunum of a retriever. PK0576. H&E. Original mag. 33x. Jejunum. Samll intestine. Digestive System. Dog.

Jejunum of a retriever at low magnification. Note the villi and the crypts. PK0574. H&E. Original mag. 13x. Jejunum. Small

Tip of villi from the duodenum of a dog. The mucus in the goblet cells stained brightly. The lamina proria

This section was stained with PAS. Notice the mucus in the goblet cells stained differently from that of the Brunner’s

At this magnification you can clearly see the cells that make up the Brunner’s glands. Notice the size, shape and

A medium power micrograph of the duodenum from a dog. J8. PK1624 PTAH. Original mag. 25x. Brunner’s glands. Duodenum. Small

Duodenum at low power showing the villi, the crypts and the Brunner’s glands. Note the location of the muscularis mucosae.