Temple University School of Medicine - Skull Yearbook (Philadelphia, PA)

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J. Robert Troyer. Ph.D. Imagine if you will . . In the last 3 minutes I'd like to go over partitioning of the embryonic body cavity. Turn to page two of the handout. In the rostral portion of the early embryonic cavity lies the prospective pericardial cavity (see page 4 of the handout. Figure A). With flexion of the fetal head, the pericardial cavity assumes a ventral position while still being continuous with the rest of the embryonic body cavity (Figure B). Meanwhile, the septum transversum develops which incompletely separates the thoracic body cavity from the abdominal body cavity in that the prospective pleural and peritoneal cavities communicate dorsal to this structure (Figures C and Dl. The right and left pleuropericardial folds develop from the dorsolateral body wall and caudally connect with the dorsal margin of the septum transversum (Figure E). These folds grow medially between the heart and lungs and attach to the primitive mediastinum (Figure F). The right and left pleuroperitoneal folds grow caudally and medially from the septum transversum, running essentially at right angles to the pleuropericardial folds (Figures G and HI. These meet in the midline around the developing esophagus (foregut) (Figure I) and separate the pleural cavities cephalically from the peritoneal cavity caudally (Figure J). Questions? Yes, this will be on the exam on Monday. Let me make this perfectly clear . . . c fMON mnn 27

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Anatomy-Histology-Neuroanatomy

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Neal E. Pratt, Ph.D. John Franklin Huber, M.D.. Ph.D. Daddy Huber M. Noble Bates, Ph.D. That stuff'll make you bald, Bittar. Dr. Way will give a demonstration of the cremasteric reflex in the second floor men's room on Tuesday, October 17 at 7:45 A.M. All interested are invited to attend. John S. Way, Ph.D. Your place or mine? 28