Digestive System: Gastrointestinal tract 4 layers Flashcards
(13 cards)
-adjacent to the lumen of the canal.
Contains an epithelial membrane which functions to:
-secrete mucus, digestive enzymes or hormones
-absorb products of digestion (small intestine) or water, electrolytes and vitamins (large intestine)
mucosal layer
-surrounds mucosa; consists of loose connective tissue containing nerves, blood and lymphatic vessels.
submucosa
-surrounds submucosa; consists of two layers of smooth muscle: an inner circular layer, and an outer longitudinal layer. The structure of the muscularis externa is responsible for segmentation and peristaltic activity of the alimentary tract.
muscularis externa
-serous membrane that covers the muscularis externa. It is found along most of the digestive tract, but in the thoracic region, it is called adventitia.
serosa
Which layer is adjacent to the lumen of the canal?
mucosal layer
The mucosal layer contains an epithelial membrane which functions to:
- secrete mucus, digestive enzymes or hormones
- absorb products of digestion (small intestine) or water, electrolytes and vitamins (large intestine)
Which layer surrounds mucosa?
submucosa
The layer that consists of loose connective tissue containing nerves, blood and lymphatic vessels.
submucosa
Which layer surrounds submucosa?
muscularis externa
The muscularis externa consists of two layers of smooth muscle:
an inner circular layer, and an outer longitudinal layer.
What is the structure of the muscularis externa responsible for?
-segmentation and peristaltic activity of the alimentary tract.
What is the serous membrane that covers the muscularis externa?
serosa
What is found along most of the digestive tract, but in the thoracic region, it is called adventitia?
serosa
