Compares the jejunum and ileum, the two mobile sections of the small intestine, which together measure roughly 3 to 5 metres. Covers each segment's diameter, length share, position, wall thickness, mucosal folds, vasa recta, arcades and mesentery, with the jejunum described as thicker-walled with long vessels and the ileum as thinner-walled with richer mesenteric fat. Notes that only the start of the jejunum and the end of the ileum are fixed in place.
Topic 11 of 44 in the MU Sofia syllabus for Anatomy (Internal Organs+Glands) (Medicine, Years 1 and 2). The free AceMed note covers it in 3 sections, about 96 words (1 min of reading), with 10 flashcards.
In this note
JEJUNM & ILEUM
Jejunum:
Ileum:
JEJUNM & ILEUM
* Only initial part of the jejunum and the terminal ileum are held firmly in place, the rest of the jejunum and ileum is freely mobile in the abdominal cavity.
jejunum & ileum together 3-5 m
Jejunum:
→ From duodenojejunual
Diameter: 3 cm
Length 2/5
Location: superior & Left
Thick wall
Inner mucosal is numerous
long vasa recta (straight blood vessels)
Simple atrial arcades.
Mesentry: long with less fat. infeltration
Ileum:
Diameter 2.5
Length 3/5
Location : inferior and right
Thin wall
less mucosal folds
Short vasa recta
Complicated Atrial arcades
Menestry : Short with richer fat infilteration.
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