Stomach And Spleen Flashcards
Types of -tonic stomachs
- Hypertonic: Super tight
- Hypotonic : sagging
- Atonic: sagging and shrunken
Parts of stomach
- Cardia
- Cardiac notch
- Fundus
- Body
- Greater curvature
- Lesser curvature
- Incisura angularis
- Pyloric antrum
- Pylorus
Cell type of oesophagus vs stomach
Oesophagus: stratified squamous
Stomach: columnar
Cardia function
Mucus secretion
Fundus function and location
Storage (air can get trapped)
At 5th intercostal space
Body
Storage
Secretion of hcl /pepsinogen /IF /mucus
Pyloric antrum function and location
At transpyloric plane
Mixing
Gastrin secretion
Min max capacity of stomach
0.075-2 litres
Gut wall layers
Mucosa
Submucosa
Muscularis externa
Adventitia / serosa
Mucosa contents
Epithelium-> lamina propia -> muscularis mucosa GALT Submucosal gland Mucosal gland Duct of accessory gland
Submucosa contents
Loose ct Bv Lymphatics Nerves (submucosal/meissner’s plexus) Glands (sub-mucosal gland)
Muscularis externa contents
Inner oblique (stomach only)-> inner circular -> outer longitudinal Myenteric/auerbach’s plexus
Adventitia/serosa contents; when do you call it serosa
CT or peritoneum
Extrinsic nerves (SNS/PNS)
Bv
Called Serosa only if in peritoneal cavity
Effect of inner oblique
Reggae in stomach -> good absorption
Celiac trunk vasculature
Common hepatic:
Proper hepatic-> cystic; right; middle; left; right gastric (lesser curvature)
Gastroduodenal-> superior pancreaticduodenal; right gastroepiploic (greater curvature)
Supraduodenal
Left gastric: (distal oesophagus + lesser curvature)
Splenic: Posterior gastric Short gastric (fundus of stomach) Splenic branches Left gastroepiploic
Lamina propria of mucosa function
Like basement membrane
Venous drainage of stomach
Gastric; gastroepiploic; splenic drain into hpv
Oesophagal plexus can drain into hpv or azygos vein (runs up side of thoracic vertebral column towards Superior vena cava; to systemic circulation)
Lymphatic drainage of stomach
Right gastric+ left gastric + pyloric + splenic + right gastro-omental -> coeliac -> cysterna chyli-> thoracic duct
Stomach nerve supply
PNS : CNX gives rise to left vagus (oesophagus + anterior of stomach) + right vagus (oesophagus + posterior of stomach)
SNS: T6-9 (T9 supplies stomach)
Afferents responsible for epigastric pain
Efferents for vasoconstriction and anti peristalsis
Spleen location and features
Ribs 9-11
Intraperitoneal
Largest lymph organ
Highly vascular
Spleen function
Haemopoiesis
Removes blood borne antigens
Old RBC destruction and storage
RBC and platelet storage
Spleen surfaces
Upper pole/lower pole
Diaphragmatic surface
Visceral surface: gastric/colic/renal
Hilum
Enlarged spleen features and causes
Features: can be palpated; visible Causes: liver disease Infection Blood cancers Gaucher’s disease Abnormal/occluded blood flow Blood cell disorders Inflammatory disease
