Cavity separation

Question 1

what does thorax get divided into?

Answer 1

heart (percardial) cavity and two pleural cavities (lungs)

Question 2

after folding, where is there an open canal? what closes it off?

Answer 2

between future thorax and future abdomen/diaphragm formation

Question 3

what is the septum transversum?

Answer 3

thick mesoderm near heart. brought around to base of where heart is developing. will send off membranes that will off an open cavity and create the diaphragm

Question 4

what do cardiovascular congenital defects or variations reflect in adult anatomy?

Answer 4

heart defects or variations/ great vessel defects or variations

Question 5

what do neural system congenital defects or variations reflect in adult anatomy?

Answer 5

brain and spinal cord abnormalities or variations

peripheral nerve defects

Question 6

what do GI system congenital defects or variations reflect in adult anatomy?

Answer 6

abnormal rotation of the gut leads to variations
abnormal evagination of foregut derivatives or variations
endocrine problems due to abnormal gland development

Question 7

what can happen if diaphragm fails to develop properly?

Answer 7

left pleuroperitoneal membrane may not seal off the left pleural cavity completely from the peritoneal cavity. abdominal contents may herniate through the pericardioperitoneal canal, preventing normal development of lung on that side.