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L6, Development of the hind gut, Anatomy

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MCQ

1-The junction between the segment of transverse colon derived from the midgut and that originated from the hindgut is indicated by

A. the change in blood supply from superior mesenteric art. to inferior mesenteric art.

B. the change in blood supply from celiac to inferior mesenteric art.

C. the change in blood supply from inferior mesenteric to superior mesenteric art. 


2) The distal dilated portion of the primitive gut, distal to allantois is called:
A. perineal
B. proctodeum
C. cloacal 


3) A diverticulum projecting ventrally from hindgut into umbilical cord is called:
A. allantois
B. cloaca
C. stomodeum


4) The area of fusion of urorectal septum with cloacal membrane is called:
A. primitive perineal
B. proctodeum
C. cloaca 



5) The lower part of the anal canal is....... in origin and covered by........
A. endoderm, stratified squamous epithelium
B. ectoderm, stratified squamous epithelium
C. ectoderm, mucous membrane 


6) The remnant of pectinate line in the adult is called:
A. cloaca
B. stomodeum
C. anal valve 


7) The artery of hindgut:
A. superior mesenteric
B. inferior mesenteric
C. celiac 


Answers of MCQ

1) A 2) C 3) A 4) A 5) B 6) C 7) B 



Enumerate


1) Enumerate the derivatives of the hindgut:
The left one third of the transverse colon
The descending colon.
The sigmoid colon.
The rectum. (cloaca)
The upper part of the anal canal. (cloaca)


2) Enumerate the congenital anomalies of the hindgut:
Rectal atresia
Rectal fistula: recto- viscal fistula, recto-vaginal fistula
Anal canal: Imperforate anus
Colon: Congenital megacolon (Hirchsprung’s disease, aganglionic colon)


3) Enumerate the development of anal canal:
The upper part is derived from hindgut (endoderm)
Lower part is drived from the proctodeum (ectoderm)
The junction of the two parts is indicated by pectinate line


4) What is the meconium
At full term the large intestine filled with mixture of, bile.
Amniotic fluid and intestinal glands secretion which is dark green in color called meconium

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