Embryology and Development — Flashcards

_____ defects arise due to failure of the neuropores to fuse by the 4th week of pregnancy

In the developing ovaries, primordial germ cells produce _____ by mitotic divisions until gestational weeks 20 to 24

The _____ artery is a derivative of the 1st aortic arch

_____ part of the tongue and the epiglottis is derived from the third swelling in the posterior part of the 4th arch

The embryonic _____ gives rise to the smooth part of the right atrium

The _____ and 4th branchial arches form the posterior one-third of the tongue

The short arm of the chromosome is known as the _____, and the long is the q arm

Development in the extremities proceeds from _____ to distal (proximal/distal)

The _____ is the location where the ectoderm of the pharyngeal cleft meets the endoderm of the pharyngeal pouch

The _____ on the fetal side of the placenta is also known as Langhan's layer