Identify and briefly describe the labeled stages and structures in this diagram of embryonic development. Specify where cleavage and gastrulation are occurring.
What will be an ideal response?
A. Cleavage is occurring during this time of development.
B. Gastrulation is occurring during this time of development.
C. Morula: A morula is a solid ball of cells.
D. Blastocoel: A blastocoel is a fluid-filled cavity in a blastula.
E. Blastula: A blastula is a hollow ball of cells.
F. Archenteron: An archenteron is the primitive gut.
G. Ectoderm: The ectoderm gives rise to the nervous system, the epidermis, and derivatives of the epidermis.
H. Endoderm: The endoderm gives rise to the lining of the digestive tract and respiratory tract and the glands associated with these systems.
I. Blastopore: The blastopore is the opening into the primitive gut formed at gastrulation.
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