Source: http://humangrossanatomy.org/anatansguide/essayans298.htm
Timestamp: 2019-04-19 09:03:47+00:00

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The lesser sac is a diverticulum in the superior region of the peritoneal cavity. Communication with the greater sac is via the epiploic foramen. For the most part, the lesser sac is posterior to the stomach and liver, anterior to the pancreas and diaphragm, superior to the duodenum, pancreas, and transverse mesocolon, inferior to the liver and diaphragm, left of the caudate, and right of the gastroleino and leinorenal ligs.
The arterial supply is mostly from the ovarian arteries.
Paired arteries arise from the anterolateral surface of the aorta near the level of the third lumbar vertebra.
The ovarian veins arise from the IVC on the right and the left renal vein on the left.
Lymph drainage is primarily along the embryological decent of the ovary.
The tear in the inferior fascia of the urogenital diaphragm transmits urine from the deep pouch to the superficial perineal pouch. The intact superior fascia of the urogenital diaphragm prevents urine from entering the ischiorectal fossa. The accumulation of urine will be restricted by the boundaries of Scarpa's (membranous) fascia proper and the derivatives of Scarpa's fascia.
The internal pudendal artery arises from within the pelvic and a branch of the internal iliac artery. It leaves pelvis via greater sciatic foramen to enter gluteal region. The short gluteal course loops posterior to ischial spine. Inferior the the spine the artery enters the ischiorectal fossa via lesser sciatic foramen.
preganglionic sympathetics - imlcc of T10-12, synapse in aorticorenal g.
esophageal a. v. from left gastric a. v.
ascending lumbar veins or azygos v.
anterior peripheral by musculocutaneous a. v. and anterior intercostal a. v.
posterior peripheral by posterior intercostal a. v.
peripheral sensory by intercostal n.
central tendon motor and sensory by phrenic n.

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