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Human embryogenesis is the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one celled zygote to an adult human being. Fertilisation occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form a single cell called a zygote and the germinal stage of prenatal development commences. Embryogenesis covers the first eight weeks of development and at the beginning of the ninth week the embryo is termed a fetus.Human embryology is the study of this development during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.

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  • مراحل تطور الجنين البشري
  • Embriogénesis humana
  • Embryogenèse humaine
  • Embriologia umana
  • Human embryogenesis
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  • L'embryogenèse (ou embryogénie) humaine désigne le processus de développement de l'embryon humain depuis le stade de zygote jusqu'à la naissance.
  • Se denomina embriogénesis humana al proceso que se inicia tras la fecundación de los gametos para dar lugar al embrión, en las primeras fases de desarrollo de los seres vivos pluricelulares. En el ser humano este proceso dura unas ocho semanas, momento a partir del cual el producto de la concepción acaba su primera etapa de desarrollo y pasa a denominarse feto.
  • تطور الجنين البشري هو عملية الانقسام والتمايز الخلوي للجنين التي تحدث أثناء المراحل الأولى للنمو. بلغة علم الأحياء فإن النمو البشري يستمر في التطور من مرحلة اللاقحة ذات الخلية الواحدة إلى الإنسان الناضج. والتخصيب يحدث عندما تنجح خلية الحيوان المنوي في الدخول إلى والاندماج مع خلية البويضة، وتجتمع المادة الوراثية للحيوان المنوي والبويضة كي تشكل خلية واحدة تسمى اللاقحة، ومن ثم تبدأ المرحلة الجرثومية Germinal stage للنماء السابق للولادة. ومراحل تطور الجنين تغطي أول 8 أسابيع من النمو، وفي بداية الأسبوع التاسع يطلق على هذا الجنين الجرثومي Embryo اسم الجنين الحي Fetus.
  • Human embryogenesis is the process of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, human development entails growth from a one celled zygote to an adult human being. Fertilisation occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form a single cell called a zygote and the germinal stage of prenatal development commences. Embryogenesis covers the first eight weeks of development and at the beginning of the ninth week the embryo is termed a fetus.Human embryology is the study of this development during the first eight weeks after fertilisation. The normal period of gestation (pregnancy) is nine months or 38 weeks.
  • L'embriologia umana, come del resto l'embriologia in genere, studia lo sviluppo embrionale, cioè le primissime fasi della vita, che hanno inizio con lo zigote.Il termine embrione viene utilizzato con significati non sempre coincidenti. Le prime fasi di sviluppo dell'organismo umano comunque sono universalmente definite: zigote, morula, blastula e gastrula. La letteratura scientifica è abbastanza concorde invece nello stabilire la fine della fase embrionale attorno alla nona - dodicesima settimana, quando, sino al momento del parto, si parla correttamente di feto.
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