Please Define the Following Key Terms

question 34

Essay

Please define the following key terms. Show Who? What? Where? When? Why Important?
-Grozny

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Definitions:

Blastocyst

An early stage in human embryonic development that consists of a sphere of cells surrounding a fluid-filled cavity and the cluster of cells from which the embryo develops.

Embryonic Stage

The period in prenatal development from the second to the eighth week after fertilization, during which major organs and structures of the organism begin to develop.

Fetal Stage

The developmental period in pregnancy from the ninth week after fertilization until birth, when significant growth and maturation of the fetus occur.

Phenotype

The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.