Question

birth defect in an infant with no cerebral hemispheres and cranial vault. use the following word components to build medical terms matching the definitions given. word components: an-, dips/o, esthes/o, -malacia, myel, cele, dys-, -gram, -mania, narc, -cele, encephal, hydro, mening, narc/o, cephal, encephal/o, -ia, mening/o, -phasia, cephal/o, esthes, -lepsy, myel/o, -schisis, ventricul, ventricul/o

Explanation:

The prefix "an -" means without. "cephal" or "cephal/o" refers to the head. Since the infant has no cerebral hemispheres and cranial vault, combining "an -" and "cephal/o" gives the medical term anencephaly which describes this birth defect.

Answer:

anencephaly