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term for the 'fertilized egg' |
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What week does organogenesis begin in the embryo? |
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Term for the movement of cells in week 3. Goes from bilayer to trilayer. |
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term for the type of movement epiblast cells exhibit as they travel through the primitive streak |
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Hypoblast cells replaced by _____ cells |
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mesoderm formed by ingression of ______ cells |
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notochord created by the ingression of ______ cells |
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notochord is a dense collection of _____ cells (which layer?) |
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Two congenital defects resulting from lack of complete neural tube formation. |
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Definition
spina bifida, anencephaly |
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name of ecdoderm structure folding up to form the neural tube |
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name of ingressed ectoderm that lies superior to the neural tube. goes on the form the PNS and other structures. |
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Names of mesoderm layers starting axially and moving laterally: |
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Definition
notochord (axial mesoderm), paraxial mesoderm (sclerotome/myotome/dermatome), cardiac tubes, intermediate mesoderm, somatic/splanchnic lateral plate mesoderm |
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Term
folding that gives ride to the head and tail regions of the embryo. |
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fluid-filled cavity within the mesoderm |
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Ectoderm forms all _____ and some _____ tissues. |
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germ layers that give rise to epithelial tissues |
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Definition
all of them (ectoderm, endoderm, mesoderm) |
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Definition
all muscle, epithelia of urogenital system and cardiovascular system, all connective tissue (excluding head) |
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endoderm responsible for creating: |
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Definition
epithelial tissues of the gut tube and derivatives: lungs, trachea, liver, pancreas |
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Definition
epidermis, hair, finernails, tooth enamel, sweat glands, mammary glands, CNS, PNS, melanocytes, connective tissues of the head, adrenal medulla, tooth dentine, great vessels of the heart |
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term referring to the neural tube and neural crest cells |
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subdivisions of the myotome (somite) |
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epimere (muscles of the back), hypomere (muscle of the body wall and limbs) |
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segmented embryo caused by various ______ along it's length |
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