Development Flashcards
Blank is how gametes meet in the same place at the same time
Mating
When sperm and egg cells join outside of the bodies of the parents the going is called (. ) this type of fertilization is common with (. )
External
Fish
When sperm and egg cells join inside the body of the female parent the joking is called (. ) this type of fertilization is common with (. )
Internal
Birds
During embryonic development the (. ) develops
Embryo
During the first week the mass cells hollows out and is called a (. )
Blastula
The development of organs and body structures from the blastula layers is called
Differentiation
After the first eight weeks of development the embryo is called the
Fetus