GI Images Histology

All the pictures for GI system

Tongue

Striated muscles of tongue

arrangement only found in tongue, heart and stomach: has oblique, transverse and longitudinal sections

Papillae on physical tongue

Filiform Papillae

Filiform Papillae Physical Tongue

Fungiform Papillae Physical Tongue

Fungiform Papillae

Circumvallate Papillae Physical Tongue

Circumvallate Papillae

Foliate Papillae

Foliate Papillae Physical Tongue (top)

Hairy Tongue Physical

over keratinized of filiform papillae

Hairy Tongue Histology

Geographic tongue Physical

Under keratinized of filiform papillae

Geographic tongue histology

Under keratinized and loss of papilla

Taste Bud

Beneath the taste buds are nerve fibers that are

also lightly stained

Easily identified by LM 3 cells (1) basal cells which are stem cells (2) supporting cells (3) taste receptor cells of sensory cells and these cells synapse with afferent nerves

Have pore opening and microvilli

Pulp Cavity

Enamel

Dentin

Cementum

Periodontal Ligament

Tooth formation Bud Stage

Tooth formation Cap Stage

Tooth formation Bell Stage

Tooth formation Oppositional Stage

Tooth formation Erruption Stage

Tooth formation Functional Stage

Ameloblast

Forming Enamel

Odontoblast

Forming dentin

Enamel

Dentin

Major Salivary Gland

Parotid Gland Histology

Parotid Gland Serous Acini (pinkish)

Sublingual Gland Mucous Acini (very light color, nuclei flattened)

Mixed Acini (serous demilune)

Parotid gland - entirely serous

Submandibular - Mixture (mostly serous)

Sublingual- Mixture (mostly mucous)

Salivary Gland Duct

Striated Duct

The basal membrane forms folds that contains numerous long vertical mitochondria characteristic of ion- pumping activity.

Mitochondria give appearance of striated ducts

Myoepithelial Cells

Pharynx

Layer reference

Esophagus Layers

Esophageal cardiac glands

- Present in lower portion in mucosa, produce mucus with neutral pH.

Esophageal glands proper

- Present in submucosa. Produce mucous secretions for lubricating the luminal wall.

Middle Esophagus Muscularis

Lower Esophagus Muscularis

Esophageal Cardiac Junction

Esophageal Cardiac Junction

Barrett’s esophagus

Eosinophilic Esophagitis

Esophagitis

1. Lumen
2. 2.Epithelium-SSE-nonkeratinized
3. Lamina propria
4. Muscularis mucosae
5. Submucosa
6. 6a.Inner circular smooth muscle;

6b.Outer longitudinal smooth muscle

7. Adventitia

Stomach Histology

Rugae of stomach

Rugae Histology

Stomach Secretory

secretory cells form grandular sheet

Cardiac portion stomach glands

Pyloric portion stomach glands

Body and Fundus (gastric glands) portion stomach glands

Stomach Glands

Stomach - Cardiac Glands Histology

Cardiac Gland image

Stomach Body and Fundus (gastric glands)

glands are branched but straight extending from bottom of pit

all the way to muscularis mucosa

Corpus Fundic or Principle Glands

Stomach Pyloric Glands Histology

Pyloric Gland

Gastric Gland Overview

Gastric Gland Cell type

Surface Mucous Cells

• Simple columnar epithelium

Mucous Neck Cells

Gastric Gland

Parietal Cell

Large, eosinophilic (pinkish), fired egg

Parietal Cell

Parietal Cell

Chief Cells

Appear basophilic (more blue/purple in color)

Yellow = chief cells + last image + blue arrows

Green = Parietal Cell

Enteroendocrine cell

Pyloric Sphincter

Infantile Hypertrophic Pyloric Stenosis (IHPS)

Gastric Ulcer

Pancreas

Exocrine pancreas = made up of serous acinar

Duct of Pancreas

Pancreas VS Parotid

See the intercalated ducts start in the acini (green circled area)

Intercalated and Intralobular Ducts

Endocrine pancreas

Esophagus

Fundic/Body Region

Surface with pits

Straight glands reaching MM

Parietal Cells

Arrow pointing to Surface Mucous Cells

Chief cells

AT BASE ——- More basophilic (blue/purple)

Parotid Gland

Serous + Striated Ducts

Parietal Cells

Plicae Circulares

Villi