Structure Of Tissues Flashcards
How does the gut move lumina contents along?
Muscularis externa creates successive peristaltic waves
Four layers of the gut wall
Mucosa (innermost)
Submucosa
External muscle layers (muscularis externa)
Serosa
What is the mesentry?
Between the simple squamous epithelia and connective tissue in serosa
Contains arteries, veins and nerves
What covers peritoneal organs?
Serosa
Layer of mesothelium, the visceral peritoneum
What covers retro peritoneal organs?
Adventitia
Loose connective tissue
Layers of oesophagus
Epithelium Lamina propria Muscularis mucosa Submucosa Muscularis externa Adventitia
Epithelium of oesophagus
Stratified squamous non-keratinised
Lamina propria of oesophagus:
Loose connective tissue bearing blood and lymph vessels
Some smooth muscle cells
Many cells of immune system
What is muscularis mucosa?
Thin layer of smooth muscle cells
What is submucosa?
Subtending layer of connective tissue containing mucus secreting glands
Muscularis externa of oesophagus
Smooth muscle layers
(Inner circular, outer longitudinal)
Move food via peristalsis
What is adventitia?
Thin outermost layer of connective tissue
Layers of stomach
Epithelium Gastric mucosa Muscularis mucosa Submucosa Muscularis externa Rugae
Epithelium of stomach
Simple columnar epithelia for absorption
Gastric mucosa of stomach
Secretes acid, digestive enzymes and gastric (hormone)
Muscularis externa of stomach
Three layers (oblique, circular and longitudinal) Of smooth muscle in the stomach
Rugae of stomach
Folds of the gastric mucosa forming longitudinal ridges in an empty stomach
Layers of jejunum
Jejunal mucosa Epithelium Submucosa Muscularis externa Pilicae circulares
Jejunal mucosa
Epithelia, lamina propria and muscularis mucosa
Epithelium of jejunum
Simple columnar (absorption)
Muscularis externa of jejunum
Two layers