Chapter 3. Dental Embryology Prenatal Development questions with correct answers

amniotic cavity CORRECT ANSWER the fluid-filled space between the embryo and the amniotic sac amniocentesis CORRECT ANSWER needle puncture of the amniotic sac to withdraw amniotic fluid for analysis Anodontia CORRECT ANSWER absence of teeth Axis CORRECT ANSWER Embryonic Folding- establish the axis, places forming tissues types into their proper positions for further embryonic development, produces a tubular embryo Blastocyst CORRECT ANSWER A fluid-filled sphere formed about 5 days after fertilization of an ovum that is made up of an outer ring of cells and inner cell mass. This is the structure that implants in the endometrium of the uterus. Caudal end CORRECT ANSWER tail end of structure cephalic end CORRECT ANSWER head end of structure Cleavage CORRECT ANSWER Process during prenatal development when mitosis converts zygote to blastocyst. congenital malformations CORRECT ANSWER refers to physical defects developing either in the uterus or dating from birth Down Syndrome CORRECT ANSWER a condition of intellectual disability and associated physical disorders caused by an extra copy of chromosome 21.