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補充 Development's phases for human beings.

鄭先祐 (Ayo) 製作. 補充 Development's phases for human beings. Table 16-1 Early stages of development 1. Fertilization ( 受精) 2. Cleavge ( 卵割) 3. Morula ( 桑椹胚) 3. Blastula ( 囊胚) 3. Gastrulation ( 原腸胚形成) 4. Neurulation ( 神經管形成).

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補充 Development's phases for human beings.

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  1. 鄭先祐(Ayo) 製作 補充 Development's phases for human beings. Life Science 2010

  2. Table 16-1 Early stages of development 1. Fertilization (受精) 2. Cleavge (卵割) 3. Morula (桑椹胚) 3. Blastula (囊胚) 3. Gastrulation (原腸胚形成) 4. Neurulation (神經管形成) Life Science 2010

  3. 補充 Late stage of development of the allantois in a chick embryo. Life Science 2010

  4. Amnion chorion allantois Yolk sac Extraembryonic coelom 補充 Early stage of development of the allantois in a four-day-old chick embryo. Life Science 2010

  5. 補充 Embryo of placental mammal. Life Science 2010

  6. 補充 various vertebrates embryos at the organogenesis stage of development illustrating similarity of gross structure. Life Science 2010

  7. Fig. Schematic of the Saunders-Zwilling hypothesis for the mutual interactions of the apical extodermal ridge (AER) and mesoderm. The AER stimulates mesodermal outgrowth, while an apical ecotodermal maintenance factor (AEMF) from mesoderm promotes the health and well being of the AER. The zone of polarizing activity (ZPA) may influence anterior-posterior determination. Life Science 2010

  8. Fig. Experimental procedures (a, b) and results (a', b') of grafting additional putative zones of polarizing activity (ZPA) to different sites on chick limb buds. Life Science 2010

  9. Fig. In the normal limb (A), the zone of polarizing activity is presumed to be the source of morphogen, which would theoretically diffuse across the limb to form a concetration curve, as seen in B. Life Science 2010

  10. Life Science 2010

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