17 Questions
Which structure suspends the midgut loop from the dorsal abdominal wall?
Mesentery
What is the reason for physiologic umbilical herniation during the sixth week of development?
Insufficient space in the abdominal cavity due to the growing liver and kidneys
What structures are derivatives of the midgut?
Cecum, ascending colon, left half of the transverse colon
What allows communication between the midgut loop and the umbilical vesicle?
Omphaloenteric duct
Which artery supplies the derivatives of the midgut?
Superior mesenteric artery
What causes projectile vomiting in case of stomach obstruction?
Distention of the stomach with forceful expulsion of contents
Which structure initially closes the cranial end of the primordial gut?
Oropharyngeal membrane
Which structure initially closes the caudal end of the primordial gut?
Cloacal membrane
Which part of the adult anal canal is derived from the hindgut?
The superior two-thirds
Which part of the adult anal canal is derived from the anal pit (proctodeum)?
The inferior one-third
Which embryonic layer gives rise to the epithelium at the cranial ends of the alimentary tract?
Ectoderm of the stomodeum
Which embryonic layer gives rise to the muscular and connective tissue layers of the alimentary tract?
Splanchnic mesenchyme
Which structure develops from the cecal swelling (diverticulum) during the sixth week of development?
The appendix
What is the result of the unequal growth of the walls of the cecum after birth?
The appendix enters the medial side of the cecum
What is a common birth defect related to the rotation of the midgut?
Malrotation of the gut
What is the result of nonrotation of the midgut (left-sided colon)?
The small intestine lies on the right side of the abdomen, and the entire large intestine lies on the left.
What is the initial appearance of the cecum and appendix during development?
The cecum appears as a small diverticulum (pouch) on the antimesenteric border of the caudal limb of the midgut loop.
Learn about the derivatives of the midgut including the small intestine and colon, as well as the condition of pyloric stenosis which leads to projectile vomiting. Explore the anatomy and potential treatments for these issues.
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