Multiple Choice
Which of the following developmental events is correctly matched with its trimester?
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28. Human Development
Embryonic Development (Weeks 3-8)
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At what point during embryonic development does the embryo form three germ layers?
A
Week 4
B
Week 5
C
Week 2
D
Week 3
Verified step by step guidance1
Understand the concept of germ layers: Germ layers are the primary layers of cells that form during embryonic development, which will later differentiate into all tissues and organs of the body.
Identify the process of gastrulation: Gastrulation is the phase in embryonic development when the single-layered blastula reorganizes into a trilaminar (three-layered) structure known as the gastrula.
Recognize the timing of gastrulation: Gastrulation typically occurs during the third week of embryonic development.
Connect the formation of germ layers to gastrulation: During gastrulation, the three germ layers—ectoderm, mesoderm, and endoderm—are formed.
Conclude that the embryo forms three germ layers during the third week of development, which aligns with the process of gastrulation.
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Master Gastrulation: Germ Layer Formation (Days 12-16) with a bite sized video explanation from Bruce Bryan
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