Questions and Answers
What is the term for the solid mass of blastomeres that forms from the cleavage of a zygote?
Which structure opens to the gut and marks the beginning of invagination?
What is the internal cavity formed after the invagination process in embryonic development?
What is the primary characteristic of a coelom in an embryo?
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Which structure contains a fluid-filled cavity in the stage of blastula?
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Study Notes
Early Embryonic Development
- Morula is a solid mass of blastomeres formed after multiple cleavage events of a zygote.
- Blastopore serves as the opening to the gut where the process of invagination begins.
Cell Division and Properties
- Embryo development involves a few hundred to several thousand cells, with significant increase in total DNA content due to mitosis.
- Each daughter cell nucleus retains the original DNA content of the zygote, classifying these cells as blastomeres.
Key Structures in Embryogenesis
- The blastula is characterized by a cluster of cells known as the blastocyst.
- Archentron is the internal cavity formed following the invagination process during early development.
- Fluid-filled cavity within the blastula is referred to as the blastocoel.
Body Cavities
- Coelom is identified as a body cavity that is completely surrounded by mesoderm, playing a crucial role in the organization of the body plan.
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Description
Test your knowledge on early embryonic development, including key concepts such as morula formation, cell division, and major structures like the blastula and coelom. This quiz will challenge your understanding of important terms and processes in embryogenesis.
