What is the process by which a single cell becomes a fully formed human being?
Development
What are the three main stages of prenatal development?
Germinal, embryonic, and fetal stages
During which stage of prenatal development does the fertilized egg implant itself into the uterine wall?
Germinal stage
What is the term for the developing human organism from the second week until the end of the eighth week after conception?
Embryo
What is the term for the developing human organism from the ninth week after conception until birth?
Fetus
What is the term for the outer layer of cells that will become the structures that nourish and protect the embryo?
Trophoblast
What is the term for the inner layer of cells that will develop into the embryo?
Embryonic disc
What is the term for the fluid-filled sac that surrounds and protects the developing embryo?
Amniotic sac
What is the term for the organ that connects the developing fetus to the uterine wall, allowing nutrient uptake, waste elimination, and gas exchange?
Placenta
What is the term for the tube that connects the developing fetus to the placenta, providing nutrients and oxygen?
Umbilical cord
What is the term for the process by which cells become specialized in structure and function?
Differentiation
What is the term for the process by which cells migrate to their appropriate locations in the embryo?
Cell migration