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Intestine

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by

Dani Poveda

on 21 April 2015

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Transcript of Intestine

Embryology
Anatomy of ileum and jejunum
• Location.
• Structural features.
• Attachment of mesentery.
• Aggregations of lymphoid tissue.
• Arteries: Both jejunum and ileum are supplied by the branches of superior mesenteric artery.
• The lowest part of ileum, near the ileocecal junction, is supplied by the ileocolic artery in addition to the usual blood supply.
• Veins: Correspond to the arteries and drain into the superior mesenteric vein.

ABSORPTION OF WATER AND NUTRIENTS
Between two sheets run jejunal and ileal blood vessels, lymph vessels, nerves and extraperitoneal fat

Intestine
FOREGUT
Trachea & respiratory tract
Lungs
Esophagus
Stomach
Liver
Gallbladder & bile ducts
Pancreas (dorsal & ventral)
Upper duodenum

MIDGUT
Lower duodenum
Jejunum
Ileum
Cecum
Appendix
Ascending colon
Proximal 2/3 of transverse colon

HINDGUT
Distal 1/3 of transverse colon
Descending colon
Sigmoid colon
Rectum
Upper anal canal
Urogenital sinus

MESENTERY
ORIGIN
It derives from the embryo is called the dorsal mesentery
CHARACTERISTICS
It allows moving the viscera slide over one another
insertion in the posterior abdominal wall, extend in a fan width
Is a fold of tissue that attaches organs to the body wall
ABSORPTION OF WATER AND NUTRIENTS
• Lymph drainage of jejunum and ileum: Drain into the superior mesenteric nodes.
• Nerve supply to jejunum and ileum: Both the sympathetic and parasympathetic fibers come from the superior mesenteric plexus.

Alejandra Jaramillo
and Daniela Poveda
Full transcript