The digestive system develops from the _________ layer.

During embryonic folding the process that establishes the basic plan for all organ systems is called?

An omphalocele develops when:

A fertilized ovum is known as a:

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

During embryonic folding _______ starts the formation of the central nervous system:

Mammals lack this pharyngeal arch during development:

The smooth muscles of the pupils and sweat glands develop from the:

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

Reflexive motions of the fetal arms and legs emerge between ____ and ____ weeks of development: