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Body cavities Sanjaya Adikari Department of Anatomy

Body cavities Sanjaya Adikari Department of Anatomy

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Body cavities Sanjaya Adikari Department of Anatomy Slide 2 Amniotic cavity Secondary yolk sac Extra-embryonic coelom (chorionic cavity) Connecting stalk Slide 3 Folding of the embryo Ventral mesentary Dorsal mesentary RL Slide 4 Mesentery Formation of ventral and dorsal mesenteries divides the coelom into right and left components Most of the ventral mesentery breaks down and cause confluence of right and left halves Ventral mesentery persists in the region of the developing stomach and the liver Ventral mesogastrium (lesser omentum) Falciform ligament Slide 5 Peritoneal cavity Diaphragm separates the peritoneal cavity from the pleuropericardial cavity above Slide 6 Mesentary Slide 7 mesentery peritoneum retro-peritoneal cavity Slide 8 Pleural and pericardial cavities Slide 9 Pleural and pericardial cavities cont. Pleuropericardial folds separate the pleural and pericardial cavities Initially the pericardial cavity lies anteriorly Later, due to extensive growth of the lungs, the pleural cavities expand on either side to grow over the pericardial cavity Slide 10 Slide 11