nellembriogenesi

Nellembergénési (also known as cleavage embryogenesis) is a type of embryonic development where the fertilized egg cell undergoes several cleavages to produce a cluster of cells without significant growth. This process occurs in the early stages of embryonic development and is characteristic of certain animal species, including invertebrates and some vertebrates.

During nellembergénési, the fertilized egg cell undergoes a series of cell divisions without a significant increase in cell size. Each division produces a cluster of cells, known as a blastomere, which can divide further. This process continues for several rounds, with the cluster of cells eventually forming a blastula, a hollow ball of cells.

In contrast to holoblastic embryogenesis, where the fertilized egg undergoes significant growth and development, nellembergénési is a more passive process with minimal increase in cell size. However, the rapid cell divisions and cleavage events allow for the rapid multiplication of cells, which is essential for the development of a complex multicellular organism.

Nellembergénési is typically observed in species with simple body organization, such as flatworms and some nematode worms. However, certain species of cnidarians, such as jellyfish and corals, also exhibit similarities with nellembergénési during their early embryonic development. The study of nellembergénési has contributed significantly to our understanding of the fundamental mechanisms of embryonic development and has implications for the fields of developmental biology and embryology.