it's when you're pregnant and walking through the door and you drop it on the floor
For the first 8 weeks the developing human is called an embryo after that it is called a fetus.
After the 8th week, the embryo is called a fetus.
Fetus zygote is not the term to use. A zygote is a fertilized egg. An embryo is a developing baby. A fetus is a baby before it is born.
A developing embryo becomes a fetus at around 8 weeks after fertilization. At this point, the major organ systems have started to form and the embryo takes on a more human-like appearance.
The protective sac around the embryo or fetus is the amniotic sac.
In the seventh week of the embryo's development
Fetus
Gene combination and their expression in the embryo
zygote, blastocyst, fetus, embryo
The lungs do not play a direct role in nourishing the developing embryo and fetus. The placenta, umbilical cord, and amniotic fluid play key roles in providing nutrition and oxygen to the developing baby during pregnancy.
Placenta is the organ that provides mechanical protection and nutritional support for the developing embryo. It connects the developing fetus to the uterine wall to allow nutrient and waste exchange between the mother and the fetus.
This cluster of cells change the baby grows from pre-embryo to embryo to fetus.