Thoracic Cavity Development Flashcards
When does the Intraembryonic Coelom-primordium of embryonic body cavities develop?
During the 4th week
What is a horseshoe-shaped cavity that develops during the 4th week?
Intraembryonic Coelom-primordium of embryonic body cavities.
The future pericardial cavity is at which end of the Intraembryonic coelom?
Cranial end
What happens at the cranial end (future pericardial cavity) of the Intraembryonic coelom?
Embryo undergoes the head-fold, which brings the pericardium and heart ventrocaudally to take its position anterior to the foregut
In the Intraembryonic coelom, this part opens to the extraembryonic coelom, accommodating the growth and movement of the developing organs
Caudal limbs - future pleural and peritoneal cavities
In the Intraembryonic coelom, this part loses connection with the extraembryonic coelom during the 10th week of development as the developing intestines return to the body cavity
caudal limbs - future pleural and peritoneal cavities
Embryo folds in the horizontal plane, brining these two limbs together ventrally, which then fuse to form the peritoneal cavity
caudal limbs
In the Intraembryonic coelom, this results in a gut tube suspended between two layers of membrane (Mesentery) suspended from the body wall of the embryo
caudal limbs
These are a double layer of peritoneum that extend from the abdominal wall
mesenteries
These convey blood vessels, nerves, and lymphatics to organs
mesenteries
Which mesentery is a permanent structure?
Dorsal Mesentery
Which mesentery remains attached to caudal part of the foregut (suspends primordial liver, primordial stomach, and proximal part of duodenum, ie becomes falciform ligament and lesser omentum)
Ventral Mesentery
What divides the peritoneal cavity into right and left halves?
mesentery
What part of the mesentery covers the body wall?
parietal peritoneum
What part of the mesentery covers the organ?
visceral peritoneum
