Enteroendocrine cells in fundic stomach, rabbit (toluidine blue)

Enteroendocrine cells in fundic stomach, rabbit (toluidine blue)

Small Intestine, Large Intestine and anal cannel 32409 Small intestine Large intestine Small intestine General Structure of the Digestive Tract rat 32409 Epithelium with goblet cells

and absorptive cells Lamina propria central lacteal Muscularis mucosa Submucosa Muscularis externa (tunica muscularis) Serosa Slide #37 (Ed 904-64b). Small intestine, donkey. Mesothelium of serosa

tunica muscularis the myenteric (Auerbachs) plexus located between the inner circular and outer longitudinal smooth muscle layers of the tunica muscularis neuronal cell bodies of the submucosal (Meissners)

plexus submucosal (Brunners) glands intestinal crypts (glands of Lieberkuhn) muscularis mucosa lamina propria central lacteal muscularis mucosa Slide #37 (Ed 904-64b). Small intestine, donkey. Intestinal absorptive cells

Simple columnar epithelium Paneth cells Goblet cell Paneth cell brush or striated border = High density of nonbranching microvilli of Microfilaments are the cytoskeleton component uniform length.in microvilli Paneth cells

Slide #37 (Ed 904-64b). Small intestine, donkey Absorptive cells Enteroendocrine Cells (EC cells) Mitotic figures Enteroendocrine cells in fundic stomach, rabbit (toluidine blue) To see the distribution of EC cells among glands 244 Chief cells Parietal cell

Enteroendocrine cells monkey 146 Duodenum, Enteroendocrine cell Crypts of Lieberkhn Goblet and absorptive cells, Muscularis mucosa Lamina propria. Submucosa

Submucosal Brunner's glands. 152 Duodenum Brunners glands Absorptive cells Goblet cells Paneth cell Enteroendocrine cell Intestinal villus Slide #37 (Ed 904-64b). Small intestine, donkey. Enteroendocrine

cells DEMO SLIDE BOX 57 - Small intestine (ileum), dog. Small intestine (ileum), dog. Goblet cell Intestinal crypts (glands Or Crypts of Lieberkuhn Smooth Muscle in Intestinal villus Peyers patches

lamina propria of the villi central lacteals DEMO SLIDE BOX 57 - Small intestine (ileum), dog. Small intestine (ileum), dog. Enteroendocrine cell Intestinal crypts (glands Or Crypts of Lieberkuhn DEMO SLIDE BOX 225 (C- Small intestine (ileum), dog.H- Small intestine (ileum), dog.73). Small intestine (jejunum), dog. Absorptive cells epithelial Modifications =

Brush border and goblet cells central lacteal Strips of Muscularis mucosa lamina subglandularis muscularis mucosa submucosa DEMOSLIDE BOX 225 (C- Small intestine (ileum), dog.H- Small intestine (ileum), dog.73). Small intestine (jejunum), dog. lamina

subglandularis stratum granulosum stratum compactum muscularis mucosa submucosa Enteroendocrine cells Paneth cells lamina subglandularis

Absorptive cells DEMOSLIDE BOX 225 (C- Small intestine (ileum), dog.H- Small intestine (ileum), dog.73). Small intestine (jejunum), dog. Crypts of Lieberkuhn submucosa tunica muscularis lamina subglandularis muscularis mucosa Submucosal (Meissners) Smooth muscle

cells serosa. Mesothelium of serosa myenteric (Auerbachs) plexuses Slide #192 (Pf 5- Small intestine (ileum), dog.84d). Small intestine (jejunum), pig. . submucosa Absorptive cells lamina propria muscularis mucosa

tunica muscularis Slide #192 (Pf 5- Small intestine (ileum), dog.84d). Small intestine (jejunum), pig. central lacteal Brush border of absorptive cells Intestinal absorptive cells Simple columnar epithelium Smooth muscle cells of the muscularis mucosa lamina propria Goblet cell Paneth cells

Enteroendocrine cells Slide #89 (83 DF1) Small intestine, puppy (dog). Epithelium Lamina propria Muscularis mucosa Submucosa tunica muscularis Serosa Slide #89 (83 DF1) Small intestine, puppy (dog).

Lymph nodules Intestinal crypts (glands Or Crypts of Lieberkuhn Small intestinal villi central lacteal Slide #89 (83 DF1) Small intestine, puppy (dog). Dividing cells Epithelium Lamina propria

myenteric (Auerbachs) plexuses Muscularis mucosa (developing) Submucosa with lymphoid cell infiltration tunica muscularis Serosa Serosa mesothelium

Compare luminal surfaces of the small and large intestines small intestines Villi large intestines NO Villi DEMO SLIDE BOX 167 (C003-H-29)H-H-29)29) -H-29) Large intestine (cecum), dog. villi are absent Epithelium Lamina propria

Muscularis mucosa Submucosa tunica muscularis Smooth muscle Serosa Lymph nodules Peyers patches Intestinal crypts (glands Or Crypts of Lieberkuhn

DEMO SLIDE BOX 167 (C003- Small intestine (ileum), dog.H- Small intestine (ileum), dog.29) - Small intestine (ileum), dog. Large intestine (cecum), dog. villi are absent Intestinal crypts (glands Or Crypts of Lieberkuhn Epithelium Lamina propria Muscularis mucosa absorptive cells and goblet cells Enteroendocrine cells

DEMO SLIDE BOX 61. Large intestine (colon), cat. Epithelium Lamina propria Muscularis mucosa (developing) Submucosa with lymphoid cell infiltration tunica muscularis Serosa DEMO SLIDE BOX 61. Large intestine (colon), cat. Intestinal crypts (glands Or Crypts of Lieberkuhn

absorptive cells goblet cells Epithelium Lamina propria Muscularis mucosa Submucosa DEMO SLIDE BOX 171 (E3- Small intestine (ileum), dog.H- Small intestine (ileum), dog.38). Large intestine (colon), horse. the taenia coli; a gross thickening of the longitudinal layer of tunica muscularis in the horse.

taenia coli Lymph nodules Intestinal crypts (glands Or Crypts of Lieberkuhn DEMO SLIDE BOX 168 (C003- Small intestine (ileum), dog.H- Small intestine (ileum), dog.38) - Small intestine (ileum), dog. Large intestine (colon), dog. Intestinal crypts (glands Or Crypts of Lieberkuhn Epithelium with goblet cells and absorptive cells Lamina propria

Muscularis mucosa Submucosa Muscularis externa (tunica muscularis) Serosa DEMO SLIDE BOX 168 (C003- Small intestine (ileum), dog.H- Small intestine (ileum), dog.38) - Small intestine (ileum), dog. Large intestine (colon), dog. Enteroendocrine cells Intestinal crypts (glands Or Crypts of Lieberkuhn

Slide #43 (K9- Small intestine (ileum), dog.1). Anal region, dog. the recto- Small intestine (ileum), dog.anal junction and regional skin. skin rectum goblet cells located in the crypts nonkeratinized stratified squamous epithelium rectum regional skin circumanal glands (perianal glands)

which can become neoplastic Slide #43 (K9- Small intestine (ileum), dog.1). Anal region, dog. keratinized stratified squamous epithelium Slide #43 (K9- Small intestine (ileum), dog.1). Anal region, dog the circumanal glands (perianal glands) in this region CCT Walled off with CCT parasite external anal sphincter = bundles of skeletal muscle

DEMO SLIDE BOX 62-H-29) Rectum and anal canal, dog. the circumanal (perianal) glands skin large invagination of the anal sac. rectum simple columnar epithelium Again the simple columnar epithelium is missing. Note the approximate recto- Small intestine (ileum), dog.anal junction. At this junction, there is an abrupt change to nonkeratinized stratified squamous epithelium. Near the junction of nonkeratinized and keratinized stratified

squamous epithelium, observe the large invagination of the anal sac. The inner circular layer of the tunica muscularis is somewhat thickened to form the internal anal sphincter. The skeletal muscle fibers are part of the external anal sphincter. The anal canal is continuous with the skin of the perineal region (note the change in epithelium to keratinized stratified squamous); see the circumanal (perianal) glands DEMO SLIDE BOX 62-H-29) Rectum and anal canal, keratinized stratified squamous dog. the circumanal (perianal) glands skeletal muscle fibers

are part of the external anal sphincter skin skin nonkeratinized stratified squamous epithelium rectum tunica muscularis (smooth muscle) is somewhat thickened to form the internal anal sphincter. large invagination of the anal sac.

rectum Large intestine or Colon, monkey MUCOCUTANEOUS JUNCTIONS Slide 66: Recto-anal junction External anal sphincter Internal anal sphincter Anus Rectum

Slide 66 : Recto-anal junction Keratinized stratified squamous epithelium Hair follicles Sebaceous glands Gland ducts Apocrine glands Anus Digestive tract distinguishing features human summary

Mucosa (epithelium, lamina propria, muscularis mucosa) Submucosa (with submucosal plexuses) Muscularis (Inner circular and outer longitudinal layers, with myenteric plexuses between them) Adventitia/ Serosa Esophagus (upper, middle, lower)

Nonkeratinized stratified squamous epithelium; cardiac glands at lower end Small esophageal glands (mainly mucous) Both layers striated muscle in upper region; both layers smooth muscle in lower region; smooth and striated muscle fascicles mingled in middle region Adventitia, except at lower end with

serosa Stomach (cardia, fundus, body, pylorus) Surface mucous cells, and gastric pits leading to gastric glands with parietal and chief cells, (in the fundus and body) or to mucous cardiac glands and pyloric glands No distinguishing features Three indistinct layers of smooth muscle (inner oblique, middle circular, and outer longitudinal)

Serosa Small intestine (duodenum, jejunum, ileum) Plicae circulares; villi, with enterocytes and goblet cells, and crypts/glands with Paneth cells and stem cells; Peyer patches in ileum Duodenal (Brunner) glands (entirely mucous); possible extensions of Peyer patches in ileum

No distinguishing features Mainly serosa Large intestine (cecum, colon, rectum) Intestinal glands with goblet cells and absorptive cells No distinguishing features Outer longitudinal layer separated into three bands, the teniae colo Mainly serosa,

with adventitia at rectum Anal canal Stratified squamous epithelium; longitudinal anal columns Venous sinuses Inner circular layer thickened as internal sphincter Adventitia

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