Final answer:
Differentiation is the key process enabling the formation of major organs by week 10 of human development.
Explanation:
Differentiation is the process that allows all major organs to be formed by week 10 of human development. It involves unspecialized cells becoming specialized for specific functions in the body through gene activation and inactivation.
During differentiation, cells develop into various types suitable for specialized roles. This process is crucial in the formation of organs and tissues, laying the foundation for the body's structure and functions.
Examples include the formation of the heart as the first functional organ and the simultaneous development of various organ systems during the embryonic period.
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