The mature placenta is composed of tissues derived from:

Pharyngeal arches form after neural tube closure. Arch one will become the ___________.

The liver develops from the:

The patent ductus occurs when the ductus arteriosus __________.

True or False:  Secondary congenital neurologic disturbances are both more severe and are mainly caused by environmental factors.

In regard to congenital heart anomalies, cyanotic defect (s) include:

The Pancreas develops from the _______ layer.

A full complement of functional alveoli do not appear until?

An inherited syndrome in which some bones and tissues in the face aren’t developed:

The critical substance that supports lung maturation and function outside the uterus is called?