Urothelium 2
Urothelium 2 Free-fracture of luminal membrane of canine bladder urothelium showing polygonal plaques of hexagonally packed particles. The protein that
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Dog
Urothelium 1
Urothelium 1 Thin section electron micrograph of luminal plasma membrane of superficial cell of dog urinary bladder. The outer leaflet
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Glomerulus in the kidney of a golden retriever
In this renal corpuscle you can see both the vascular and the urinary poles. Some of the capillaries in the
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Tip of Villus from Small Intestine
Tip of a villus from the jejunum of a dog. There is some separation artifact at the junction between the
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Central Lacteal in a Villus
Cental lacteal in the core of a villus. The lacteal is part a blind-ended lymphatic vessel and is involved in
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Glands of the Canine Anal Sac. higher Magnification.
In the dog, the glands of the anal sac (sinus paranales) are large aprocrine sweat glands. They are prone to
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Anal Glands, Circumanal Glands, Anal Sac Glands
This low magnification micrograph shows the anal canal area of a dog. A variety of glands are included here but
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Glands of the Anal Sac
Glands of the anal sac from a dog. PK1636. J11a. H&E. Original mag. 10x. Anal sac. Glands of anal sac.
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Recto-Anal Junction
Recto-anal junction in the dog. The rectal area is covered by colonic mucosa. The anal canal is covered by stratified
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Mitosis in the Bottom of Intestinal Crypts
The epithelium of the GI tract is replaced on a regular basis. In the intestine mitosis takes place in the
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Villi from Canine Small Intestine
Villi from the jejunum of a retriever. PK0576. H&E. Original mag. 33x. Jejunum. Samll intestine. Digestive System. Dog.
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Jejunum at Low Power
Jejunum of a retriever at low magnification. Note the villi and the crypts. PK0574. H&E. Original mag. 13x. Jejunum. Small
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PAS Stained Duodenal Villi
Tip of villi from the duodenum of a dog. The mucus in the goblet cells stained brightly. The lamina proria
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Duodenum with Brunner’s Glands, PAS Stained
This section was stained with PAS. Notice the mucus in the goblet cells stained differently from that of the Brunner’s
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Higher Magnification of the Duodenum from a Dog
At this magnification you can clearly see the cells that make up the Brunner’s glands. Notice the size, shape and
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Duodenum of Dog with Brunner’s Glands
A medium power micrograph of the duodenum from a dog. J8. PK1624 PTAH. Original mag. 25x. Brunner’s glands. Duodenum. Small
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Duodenum at Low Power
Duodenum at low power showing the villi, the crypts and the Brunner’s glands. Note the location of the muscularis mucosae.
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Parietal and Chief Cells of the Fundic Stomach
The parietal cells of the fundic stomach stain eosinophilic due to the large number of mitochondria in the cytoplasm. These
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Mucous Glands in the Submucosa of Canine Esophagus
Mucous glands in the submucosa of the esophagus in a dog. In the dog these glands are found throughout the
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Sinus hair follicle from a dog.
Sinus or tactile hair follicle is specialized for tactile sense. Each is a single follicle which is much larger than
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Digital pad of the dog.
The digital pad of the dog contains thick stratified squamous keratinized epithelium. The cellular layers of the epidermis and the
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Digital pad of the dog, higher mag.
This section shows the stratum spinosum, the stratum granulosum and the stratum lucidum of the thick skin in the foot
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Thick skin from a dog.
This micrograph spans most of the layers of the thick skin. In one corner is the stratum basalis while in
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Compound hair follicle in dog.
Several hair follicles cluster together in the dermis to form compound hair follicle. Usually there is a primary hair follicle
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Aprocrine sweat glands in a dog.
The aprocrine sweat glands have a secretory portion and a ductal portion. The epithelium of the secretory portion contains cuboidal
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Canine sebaceous glands.
The sebacous glands secrete an oily substance, sebum, which acts as an antibacterial agent and, in hairly mammals, as a
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Ductus Epididymis, Higher magnification, Dog
Here you can make out the seterocilia. However, it may be difficult to tell exactly what these structures are made
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Ductus Epididymis, Low Power, Dog
Low power micrograph of epididymis from a dog. This is a long tubular structure that is highly coiled and compact.
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Interstitial cells of Leydig in the canine testis
Organ: Testis, Tissue: Leydig cells, Species: Dog. Comments: A cluster of interstitial cells of Leydig is surrounded by seminiferous tubules
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Autonomic ganglion in the adrenal gland of the dog
Organ: Adrenal, Tissue: Autonomic ganglion, Species: Dog. Comments: Parasympathetic ganglion with numerous basophilic neuronal cells in the adrenal of a
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Myenteric plexus of Auerbach in the canine stomach. High power
Organ: Stomach, Tissue: Myenteric plexus of Auerbach, Species: Dog. Comments: The myenteric plexus of Auerbach is found between the two
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Myenteric plexus of Auerbach in the canine stomach. Low power
Organ: Stomach, Tissue: Myenteric plexus of Auerbach, Species: Dog. Comments: The myenteric plexus of Auerbach is found between the two
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Parafollicular cells anong thyroid follicles.
The calcitonin secreting C-cells (parafollicular) cells have pale cytoplasm and are found between the follicules. Note the amount of cytoplasm
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Canine pituitary gland containing adeno- and neuro-hypophysis.
This section contains the pars distalis, the pars intermedia, reamins of Rathke’s pouch, and the pars nervosa. The pars distalis
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Herring bodies in the neurohypophysis of a dog.
The nuclei seen in this section of the neurohypophysis belong to the supportive cells. The cell bodies of the unmyelineated
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Low Power Micrograph of Canine Pituitary.
This section contains the pars distalis, the pars intermedia, reamins of Rathke’s pouch, and the pars nervosa. The pars distalis
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Junction Between Z. Reticularis and the Medulla
The cells of the zona reticularis produce small amounts of sex hormones. Being steroid synthesising and metabolizing cells, they have
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Islet of Langerhans in canine pancreas at higher magnification
Organ: Pancreas, Tissue: Islet of Langerhans, Species: Dog. Comments: Several secretory cell types, plus a network of capillaries makes up
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Islet of Langerhans in canine pancreas
Organ: Pancreas, Tissue: Islet of Langerhans, Species: Dog. Comments: Islets of Langerhans are endocrine structures that occur as clusters of
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Acidophils in the pars distalis of the canine pituitary
Organ: Pituitary, Tissue: Pars distalis, Species: Dog. Comments: A few chromophobes are found among the numerous acidophils.
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Canine adrenal cortex with zona glomerulosa and zona fasciculata
System: Endocrine, Organ: Adrenal, Tissue: Cortex. Species: Dog. Comments: Low power micrograph of dog adrenal cortex including the zona arcuata
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Canine pars distalis with acidophils
Organ: Pituitary, Tissue: Pars distalis, Species: Dog. Comments: The majority of the cells in this micrograph are acidophils. The rest
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Canine adrenal cortex
Organ: Adrenal, Tissue: Cortex, Species: Dog. Comments: Adrenal cortex with capsule. The cells in the outermost zone of the cortex
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Red and White Pulp in Canine Spleen
This section was stained by the Gomori iron method in which the metal stained blue. The nuclear counter stain used
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Trabecular Artery in Canine Spleen
The trabecular artery has a distinctive tunica media made up of smooth muscle cells. It also has a tunica adventitia
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Trabecular Vein in Canine Spleen
The trabecular vein in the spleen has an tunica intima made up of a layer of endothelial cells. The rest
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Trabecular Artery and Vein in the Spleen of a Dog
The trabeculae in the spleen contain smooth muscle cells and connective tissue. The trabecular artery has its own muscular wall
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Trabecular Artery in Canine Spleen
This slide shows the longitudinal section of a trabecular artery in the spllen. Notice the smooth muscle cells that make
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Cortex of the canine thymus
System: Lymphoid, Organ: Thymus, Tissue: Cortex, Species: Dog. Comments: The cortex contains tightly packed small lymphocytes that make this area
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Medulla of the canine thymus with Hassall’s corpuscles
System: Lymphoid, Organ: Thymus, Tissue: Medulla, Species: Dog. Comments: The eosinophilic Hassall’s corpuscles are characteristic features of the thymus. The
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Cortex and medulla of the canine thymus
System: Lymphoid, Organ: Thymus, Species: Dog. Comments: One half of the micrograph shows the cortex with tightly packed small lymphocytes
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Thymus of the dog
The cortex stains darker than the medulla because the former is mostly made up of densely packed lymphocytes. The cortex
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Thymus of the dog at low power
A thin connective tissue forms the capsule of this organ. Connective tissue septae extending inward from the capsule divide the
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Peyer’s patch in the ileum of the dog, cut “en face”
System: Lymphoid, Organ: Ileum, Tissue: Peyer’s patch, Species: Dog. Comments: Peyer’s patch cut “en face”. As the cut slants deeper
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A lymphoid nodule in the Peyer’s patch
System: Lymphoid, Organ: Ileum, Tissue: Peyer’s patch, Species: Dog. Comments: Peyer’s patch cut “en face”. Crypts of Lieberkuhn surround a
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Peyer’s patch in the ileum cut “en face”
System: Lymphoid, Organ: Ileum, Tissue: Peyer’s patch, Species: Dog. Comments: Peyer’s patch cut “en face”. Crypts of Lieberkuhn surround the
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Peyer’s patch in the ileum
System: Lymphoid, Organ: Ileum, Tissue: Peyer’s patch, Species: Dog. Comments: Low magnification of the Peyer’s patch cut “en face”. The
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Canine thymus, medulla with Hassall’s corpuscles
Organ: Thymus, Tissue: Medulla, Species: Dog. Comments: In the medulla of the thymus the cells are further apart. Thus the
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Medulla of canine thymus with thymic corpuscles
Organ: Thymus, Tissue: Medulla, Species: Dog. Comments: In the medulla of the thymus the cells are further apart and the
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Cortex of Canine Thymus
In the cortex of the thymus illions of lymphocytes are produced here each day and these are, by definition, T
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