Embryology Flashcards
What is the cloacal membrane?
Caudal area where endoderm is in direct contact with ectoderm - will form the anus
What is the allantois?
Extension of the primitive gut or yolk sac into the umbilical cord
What is the buccopharyngeal membrane?
Cranial area where endoderm is in direct contact with the ectoderm - will form the mouth
What are the cytotrophoblasts?
The inner cell layer of the trophoblast
What is the diencephalon?
Part of the forebrain that will become the optic cup and stalk, pituitary gland, thalamus, hypothalamus and pineal body
What does the greater omentum develop from?
Dorsal mesentery
What is the gubernaculum?
Part of the peritoneum attached to the gonad
What is the mesencephalon?
Part of the neural tube that will become the midbrain
What is the metencephalon?
Part of the hindbrain that will become the pons and cerebellum
What is the nephrogenic cord?
Part of the urogenital ridge contains cell that are the source of most of the urinary system
What is the neural plate?
A thick flat bundle of ectoderm directly overlying the notochord that develops in the embryo into the neural tube and subsequently the nervous system
What is the notochord?
A rod of cells constituting the foundation of the axial skeleton around which the segments of the vertebral column are formed
What is the primitive streak?
A structure involved in initiating gastrulation runs as a depression on the epiblastic surface of the bilaminar disc, is restricted to the caudal half of the embryo
What is the pronephros?
The first transient kidney structure to form, redundant in humans
What is the prosencephalon?
Part of the neural tube that will become the forebrain
What is the rhomboncephalon?
Part of the neural tube that will become the hind brain
What is the septum transversum?
A sheet of mesodermal cells located between the pericardial cavity and the yolk sac stalk that forma major part of the diaphragm
Also involved in dividing the thoracic and abdominal cavities
What is the sinus venosus?
Forms the inflow to the heart tube from the convergence of the major embryonic veins
What is the synctiotrophoblast?
The outer layer of the trophoblast
What is the telencephalon?
Part of the forebrain that will become the cerebral hemispheres
What is Tetralogy of Fallot?
Pulmonary stenosis, overriding aorta connecting both ventricles, a VSD and RV hypertrophy
What is the truncus arteriosus?
The cranial part of the primitive heart tube that becomes the ascending aorta and pulmonary trunk
Where does the ureteric bud from?
from caudal end of mesonephric duct
