Examlex
MOST U.S.high schools emphasize learning based on _____,which is developmentally appropriate.
Embryonic Period
Occurs from about 2 to 8 weeks after pregnancy, in which rapid structural development takes place.
Blastocyst
A stage of early embryonic development in mammals, characterized by a spherical structure with an outer layer of cells and a fluid-filled cavity.
Major Body Systems
The main functional systems in the human body, such as the circulatory, respiratory, nervous, and digestive systems.
Implantation
The process by which a fertilized egg attaches itself to the wall of the uterus so that the embryo can begin to grow.
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