Gastrointestinal Flashcards
(31 cards)
Digestive tract vs accessory
Digestive tract is anything that contains the food (tubes)
Intestinal layers
Mucosa
Mucosal epithelium
Lamina propria
Submucosa
Submucosal plexus
Muscular layer
Myenteric plexus
Serosa
intestine epithelium
stomach, and intestines have simple columnar cells
Plicae circulares
circular folds from the mucosa layer
lamina propria
part of the mucosa, contains BV, nerves, SM and lymphatic vessels
Muscular mucosae
SM within the mucosa
Submucosa
Larger blood vessel and lymphatics
Submucosal neural plexus
Serosa layer
Only within the peritoneal cavity (not in the pharynx, esophagus or rectum they have adventitia)
Oral vestibule
Are between lips/cheeks and teeth
Parotid gland
back of mouth 25% watery
Sublingual
undergoing 5% mucus
has many ducts to under the tongue
Submandibular
70% both
Esophageal hiatus
hole to pass through diaphragm
Esophagus wall
Mucosa (nonkeratnized squamous)
Submucosa (large folds for expansion) has simple branched mucus glands
muscular mucosae, very thin near pharynx then thickens
Surrounded by fibres adevntitia
Stomach structure
Fundus (top)
Cardia (entrance)
Body
pyloric
lesser curvature (liver to stomach)
greater curvature (stomach to fat pouch curtain
Omenta (tissue connecting curvature to other parts
Stomach innervation
Vagus nerve (para) tiggered by sight or smell
Celiac plexus (sympathetic)
Mucous surface cells
All around to protect stomach lining
mucous neck cells
Around ducts of gastric pits, mucus to lubricate food
Parietal cells
Intrinsic factor for B12
Hydrochloric acid
Chief cells
Pepsinogen->pepsin
babies also rennin and gastric lipase (milk digestion)
enteroendocrine cells (EEC)(G cells)
Gastrin to stimulate other glands
Gastric pits
contain glands in cells are branched columnar glands
intestine parts
Duodenum
jejunum
ilium
Paneth cells
located in intestinal crypts and help innate immunity
