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10 Cards in this Set
- Front
- Back
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Blastocoel
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Fluid filled cavity in the animal hemisphere of the blastula.
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Blastopore
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A dimple in the blastula 180degrees from the point of sperm entry.
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Ectoderm
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Outer layer of cells.
Precursor to epidermis, brain and nervous system. |
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Endoderm
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Inside layer of cells.
Precursor to gut and respiratory system. |
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Mesoderm
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Middle layer of cells. Some entered the blastopore.
Precursor to connective tissue, blood, heart, skeleton, gonads and kidneys. |
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Notocord
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Rod of mesodermal cells at the most dorsal position of the embryo.
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Neurula
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Embryo with a formed notochord.
The notochord signels to the dorsal ectodem cells telling them they will become the nervous system. |
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Neural Tube
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Dorsal epidermis cells elongate, stretch and fold to become a tube situated just dorsal to the notochord.
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Somites
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Mesodermal tissue adadjacent to the neural tube.
Precursor to the back muscles, spinal vertebrae and dermis. |
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Dermis
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Inner portion of the skin.
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