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Multiple Choice
Which term describes the period of human development from fertilization through the eighth week?
A
Gastrulation
B
Fetal period
C
Neonatal period
D
Embryonic period
Verified step by step guidance
1
Understand the timeline of human development: Human development is divided into distinct periods, including the embryonic period, fetal period, and neonatal period. Each has specific characteristics and timeframes.
Define the embryonic period: The embryonic period spans from fertilization through the eighth week of development. During this time, major organ systems begin to form, and the basic body plan is established.
Contrast the embryonic period with other terms: Gastrulation is a specific process within the embryonic period where the three germ layers (ectoderm, mesoderm, and endoderm) are formed. The fetal period begins after the eighth week and involves growth and maturation of the formed structures. The neonatal period refers to the time immediately after birth.
Identify the correct term: Since the question specifies the timeframe from fertilization through the eighth week, this aligns with the definition of the embryonic period.
Conclude: The correct term to describe the period of human development from fertilization through the eighth week is the embryonic period.