This is a presentation which my friend for class.

1. ARYAM
ILYAS

2. What is
Mesentery?
Clinicals
What is
Peritoneum?
Functional
Importance of
Mesentery
Formation of
Mesentery
Histological
Appearance
of Mesentery

3. Lovely, isn’t it?

4. Histological Appearance

5. THE MESENTERY IS THE FAN-
SHAPED DOUBLE LAYER OF
PERITONEUM THAT SUSPENDS
THE JEJUNUM AND ILEUM FROM
THE POSTERIOR WALL OF THE
ABDOMEN

6. THE PERITONEUM IS THIN SEROUS MEMBRANE
THAT LINES THE ABDOMINAL AND PELVIC
CAVITIES, AND COVERS MOST ABDOMINAL
VISCERA. IT IS COMPOSED OF LAYER OF
MESOTHELIUM SUPPORTED BY A THIN LAYER
OF CONNECTIVE TISSUE.
Peritoneum

7. --BETWEEN THE TWO SHEETS
OF PERITONEUM ARE BLOOD
VESSELS, LYMPH VESSELS, AND
NERVES
--LARGEST SEROUS MEMBRANE
IN THE BODY

8. The Peritoneum develops ultimately from
the mesoderm of the trilaminar embryo.
Embryological Development of
Peritoneum

9. etymology
 Greek: Peri- around, -ton- stretching.
 peritoneum means stretched around or
stretched over.
 The suffix -enteries is Greek word (enteron),
meaning gut or entrails or intestines

10. PERITONEUM ASSOCIATED
WITH THE INTESTINES IS
TERMED AS MESENTERY.

11. INTESTINES: HEM
MESENTERY: DRAPES

13. FORMATION OF
MESENTERY

14. PARIETAL PERITONEUM
VISCERAL PERITONEUM

15. If this organ is invaginated far enough into the
peritoneum, the visceral peritoneum will come in contact with
itself,
forming the organ's mesentery.
Visceral peritoneum will often surround all but a
part of the organ ("bare area")
through which the organ transmits blood vessels and
nerves
The Peritoneum invaginates at certain parts,
with an organ inside the invagination.

17. Relating Structures
 "intraperitoneal" (e.g. the stomach)
 "retroperitoneal" (e.g. the kidneys)
 "subperitoneal" or "infraperitoneal"
(e.g. the bladder).

18. The mesentery comes from the embryologic
structure the dorsal mesentery. The embryo
also has a portion of tissue called the ventral
mesentery, but this usually becomes part of the
liver.
Embryological Development of
Mesentery

22. Mesenteries in our body:
Mesentery (proper)
Mesocolon
Meso-appendix
Transverse mesocolon
Sigmoid mesocolon
Mesovarium
Mesometrium
Mesosalpinx

23. Histologically,
Mesentery is
Loose Areolar Connective
Tissue
Cells
Fibers
Ground Substance

24. Collagen type I fibers are thick and stain a darker red hue, while elastic fibers are thin and form black
crisscrosses across the tissue. The nuclei can be seen as a distinct purple hue, as well as erythrocyte
clumps that are embedded within the mesh-work of fibers. The cells are widely disperse in the
extracellular matrix, made up of ground substance and the fibers, which comprises most of the tissue.
Most of the cells found here are fibroblasts, which produce the fibers in the extracellular matrix.

25. Job
 Keeping the guts in place
 Limiting gut movement
 protection from injury
 Conduit

26. --BLOOD VESSELS
--LYMPH VESSELS N NODES
--NERVES

27. CLINICALS
Mesentery of a mouse

28. Mesenteric lymphadenitis
 A.k.a. Mesenteric adenitis: inflammation of the
lymph nodes in mesentery
 usually results from an intestinal infection.
 occurs mainly in children and teens
 often mimics the signs and symptoms of
appendicitis.
 Unlike appendicitis, however, mesenteric
lymphadenitis is seldom serious and clears on
its own.

30. •Inadequate blood flow to the mesentery
•Can lead to mesenteric infarction
•More common in the elderly
•Severe abdominal pain and the presence
of blood in the stool.
Causes:
Sudden drop In blood pressure,
Atherosclerosis, Embolus formation
Mesenteric Ischemia

31. Arterial supply of
Mesentery
Mesenteric Ischemia

32. IN CORPULENT PERSONS THE
MESENTERY, LIKE THE GREATER
OMENTUM, CONTAINS AN
ADDITIONAL QUANTITY OF FAT.
THIS INCREASED WEIGHT
TENDS TO ELONGATE THE
MESENTERY BY DRAGGING, AND
THEREFORE PREDISPOSES TO
HERNIA.

33. Pakoray or…….?

34. "I LIKE
NONSENSE, IT
WAKES UP THE
BRAIN CELLS."
---DR. SEUSS