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| ==Take the Quiz==
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| <quiz display=shuffle>
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| {Which of the following statements is most correct about oocytes :
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| |type="()"}
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| - somites
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| + lateral plate
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| - neural tube
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| - intermediate mesoderm
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| {Mesenchyme specifically refers to the middle layer of the trilaminar embryo
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| |type="()"}
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| - true
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| + false
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| || The the middle layer of the trilaminar embryo is the [[M#mesoderm|mesoderm]] (meaning middle layer), while most of these cells are [[M#mesenchyme|mesemchymal]] in appearance, this term is used to describe the cell histological appearance/organization.
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| {The intraembryonic coelom forms within :
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| |type="()"}
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| - somites
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| + lateral plate
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| - neural tube
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| - intermediate mesoderm
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| ||The [[I#intraembryonic_coelom|intraembryonic coelom]] forms initially small spaces in the mesoderm layer and coalesce to form a single large "horseshoe-shaped" space within the '''lateral plate mesoderm''' around the embryonic disc. Both young somites ([[S#somitocoel|somitocoels]]) and the neural tube (neural tube lumen) do have cavities, but neither is called the intraembryonic coelom. Note that in early development the intraembryonic coelom opens at places on the edge of the embryonic disc to the extraembryonic coelom.
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| {Ectoderm refers only to the neural plate region of the trilaminar embryo
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| |type="()"}
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| - true
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| + false
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| || The entire layer of the trilaminar embryo is the '''ectoderm''' (meaning outer layer), the neural plate is only the central portion of this layer.
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| </quiz>
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