Anatomy study note · Abdomen

Stomach

The J-shaped, dilated part of the gut in the upper abdomen. It stores food (about 1500 mL in the adult), mixes it with gastric juice into chyme, and controls its delivery to the duodenum.

Key points

• Fundus, body, antrum, pylorus (transpyloric plane, L1).
• Arteries: L & R gastric, L & R gastro-omental, short gastrics — all coeliac.
• Lymph → coeliac nodes.
• Anterior vagal trunk = left vagus; posterior = right vagus.
• Gastric ulcer: lesser curvature; posterior ulcer → splenic artery bleed.
• Foregut; ventral mesogastrium → lesser omentum.
• Congenital pyloric stenosis.
• Parietal cell: HCl + intrinsic factor. Chief cell: pepsinogen.
• Three muscle layers: oblique, circular, longitudinal.

The full note in the atlas also covers

Relations · Features · Blood supply · Nerve supply · Lymph drainage · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 7, PDF pp. 834–846
• Inderbir Singh’s Human Embryology, ch. 13, PDF pp. 180–181, 188
• BRS Cell Biology & Histology, 7th ed., ch. 16, PDF pp. 289–293

More from the abdomen

• Superficial epigastric vessels
• Superior mesenteric artery
• Suprarenal gland
• Testicular vessels
• Testis
• Transverse colon
• Transversus abdominis
• Umbilical cord
• Ureter
• Vas deferens
• Abdominal aorta
• Abdominal lymph nodes

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