basic body plan Flashcards
folding - movement of the amnion
the amnion rolls around the yolk sac
folding - movement of the yolk sac
yolk sac gets pinched into a stalk by the amnion and forms a T shape
end result of folding
endoderm in the middle (gut tube)
mesoderm in between
surrounded by ectoderm on the outside
lateral plate mesoderm shape
forms a loop on the embryonic disk
location of the cardiogenic centre
at the apex of the loop formed by the lateral plate mesoderm , above oralpharyngeal membrane
somatopleure
LP-M fused to ectoderm
body wall
splanchopleure
LP-M fused to endoderm
gut wall
seperation of the somatopleure and the splachnopluere
bubbles form between and fuse to form intraembryonic celoem
intraembryonic cavity becomes continuous with the chorion
has openings laterally
setum transversum
divides the abdomen and the thorax
movement of the septum transversum
starts off cranial to the heart and ends up caudal due to head tail folding
septum transversum creates
the central tendon of the diaphragm
percardioperitoneal canal
seperate pericardium from peritoneal canal
pericardioperitoneal fold
tissue which will close the canal off to shut off communication between the thorax and the abdomen
muscular ingrowth from the chest wall
will attatch itself to the central tendon
