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ORGANOGENEZA

ORGANOGENEZA. POTENTNOST ĆELIJA. Jajna ćelija je totipontenta; Diferencijacijom ćelije postaju unipotentne ( sposobne da obavljaju samo jednu funkciju);. SUDBINSKA MAPA. ektoderm. Arhenteron. endoderm. mezoderm. ORGANOGENEZA.

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ORGANOGENEZA

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  1. ORGANOGENEZA

  2. POTENTNOST ĆELIJA • Jajna ćelija je totipontenta; • Diferencijacijom ćelije postaju unipotentne ( sposobne da obavljaju samo jednu funkciju);

  3. SUDBINSKA MAPA ektoderm Arhenteron endoderm mezoderm

  4. ORGANOGENEZA Prvo se formira crevo( od arhemterona), zatim se formira notohorda pa nervna cev. Sledi formiranje mišića, ekstremiteta i ostalih unutrašnjih organa.

  5. NEURULACIJA 1 1.Stvaranje nervne ploče; 2. Formiranje nervnog oluka; 3. Odvajanje nervne cevi; 2 2 3

  6. Procesi koji dovode do kontrolisane promene veličine i oblika embriona-MORFOGENEZA; Može biti :- determinisana( insekti i ptice) i - kontrolisana (sisari); Druga se zasniva na indukciji koja može biti: -jednosmerna ( postanak nervne cevi); -dvosmerna( formiranje oka); -višesmerna( postanak kože); Indukciju izazivaju ćelije organizatori pomoću morfogena MORFOGENEZA

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