Lecture 17+18: G.I Tract Flashcards
Pain arising from midgut localises where?
in the periumbilical region.
Pain arising from foregut derivatives
localises where?
in the epigastric region
Pain arising from hindgut derivatives localises where?
in the hypogastric region
Intrinsic tongue muscles do what to the tongue? Innervated by what nerve?
Alter shape
Hypoglossal nerve
Extrinsic muscles alter what? And innervated by what?
Position of tongue
All innervated by Hypoglossal except palatoglossus innervated by vagus
Pharyngeal constrictors Contract wall of pharynx sequentially from superior to inferior to move food bolus from oropharynx to?
Oesophagus
Pharyngeal constrictors are innervated by what nerve?
Vagus
Which pharyngeal constrictor is more superficial and contracts last?
Inferior constrictor
The pharyngeal constrictors both insert onto what structure?
Median raphe of pharynx
What is the Innervation of the oesophagus? Superior and inferior portions
Superior portion: recurrent laryngeal (somatic)
Inferior portion: vagal trunks + greater splanchnic nerves (smooth).
Name the four parts of the stomach?
cardia, fundus, body, pylorus
What is the Innervation of the stomach?
Parasympathetic: vagus
Sympathetic: visceral afferent fibres from T6-T9 of greater splanchnic nerve
Viscera, afferent fibres of the stomach refer pain where?
Epigastric region
What is the blood supply to the stomach?
Left and right gastric artery of the coeliac trunk
What is the venous drainage of the stomach?
Gastric veins to the portal hepatic vein
The lesser omentum extends from where?
liver to lesser curvature of stomach.
The greater omentum extends from?
greater curvature of stomach to pelvis and back up.
Name the three tunica muscular is layers of the stomach?
Oblique = inner layer
Circular = middle layer
Longitudinal = external layer
What is the function of the gastric mucosa?
Protects stomach wall from gastric juice
What is the function of the gastric folds (rugae)?
Allows expansion of stomach up to 2-3L
Wat is the only part of the intestines to have peyers patches?
Ileum
What is the iliocaceal junction?
Junction between small and large intestines