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40 Cards in this Set

  • Front
  • Back
Regions of lip epithelium
1. skin (Strat squam keratinized)
2. Vermillion (same as 1)
3. Mucosal (wet stratified squamous nonkeratinized)
Palate epithelium - nasal aspect
pseudostratified ciliated columnar epithelium
Soft palate epithelium - oral aspect
stratified squamous nonkeratinized.
Describe filiform papillae
short, narrow, highly keratinized
no taste buds. Look like flames.
Fungiform papillae
mushroom shaped, interspered among filiform. occasional taste buds.
foliate papillae
shallow, longitudinal furrows. Tastebuds degenerate at young age. Look flat on top.
Circumvillate papillae
10 to 15 large circular papillae. surrounded by moat.
Glands of von Ebner
minor salivary glands found in the furrow surrounding circumvallate papillae
Esophagus epithelium
stratified squamous nonkeratineized.
Lamina propria
thin layer of loose connective tissue which lies beneath the epithelium and together with it constitutes the mucosa
Lamina propria contents - general
lymphoid tissue, capillaries, glands and ducts, loose CT
Lamina propria contents - esophageal
mucus secreting esophageal cardiac glands
Submucosa of esophagus contents
Mucus secreting
Muscularis mucosae
part of the mucosal layer of the esophagus, longitudinal
Muscularis externa
peristalsis to move bolus
inner layer circular, outer longitudinal. upper 1/3 striated, lower 1/3 smooth, middle 1/3 mixed
folds in the stomach that allow it to grow when full of food
Gastric pits
entrance to gastric glands. shallow in cardia, deepest in pylorus
Gastric epithelium
simple columnar composed of mucinogen producing surface lining cells
Gastric lamina propria
loose CT housing smoothing muscle, lymphocytes, and fibroblasts. contains gastric glands
Gastric muscularis mucosae
3 layers - poorly defined circular, a longitudinal layer, and an outer circular layer
Gastric submucosa
Dense connective tissue, collagenous. Meissner's plexus, arterial and venous plexuses.
Gastric muscularis eterna
3 layers - incomplete oblique, circular layer (forms pyloric sphincter), and outer longitudinal layer
Auerbach's myenteric plexus
located between the circular and longitudinal Auerbach's myenteric plexus
components that effect muscularis externa
lipids, viscosity, osmolality, caloric density and pH of stomach contents - all affect emptying rate.
Cells of fundic glands
Parietal, chief, mucous neck, diffuse neuroendocrine cells, regenerative cells
Parietal cells
upper half of the gland, secrete HCl and intrinsic factor. intracellular canaliculi and tubulovesicular system - increases PM area and contact with lumen
Chief cells
lower half of the gland. secretes pepsinogen. Lots of RER
mucous neck cells
located in the neck of the gland, have short microvilli and apical mucous granules
DNES cell
house small hormone containing granules.
Regenerative cells
Replace all epithelial cells of the gland, primarily in neck and isthmus.
Cardiac pyloric glands
different from fundic glands in that they are coiled tubular mucus secreting glands. No chief cells.
4 regulators of gastric secretion
Gastrin, Somatostatin, Urogastrone and gastric inhibitory peptide
Urogastrone and gastric inhibitory peptide
directly inhibit HCl secretion
Plicae circularis location
distal half of duodenum, all of the jejunum, proximal half of the ileum.
Intestinal villi
evaginations that have a connective tissue core (lamina propria) filled with capillary loops, WBCs smooth muscle, and a single lacteal
blind ended lymphatic capillary found in villi
on apical surface of epithelium. Made of actin filaments that interact with myosin filaments in a terminal web.
Goblet cells
Found in small intestine. Produces mucin, which protects epithelial linin of the lumen
Surface absorptive cells
tall columnar. lots of microvilli, have glycocalyx that binds enzymes that break down peptides and sugars. Tight junctions and zonula adherens
Glands of Lieberkuhn
extend from intervillous spaces in sm intestine into the muscularis mucosae