HOLOBLAST Meaning and
Definition
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Holoblast is a term used in embryology to describe a type of cleavage during the early stages of animal development. The word is derived from the Greek words "holos," meaning whole, and "blastos," meaning bud or germ cell. In holoblastic cleavage, the zygote, or fertilized egg, undergoes complete and equal division to form a solid ball of cells known as a morula.
During holoblastic cleavage, the division of the zygote occurs in a way that results in the formation of cells that are similar in size and structure. This type of cleavage is typically seen in animals that have a small amount of yolk or a yolk that is uniformly distributed throughout the egg. In holoblasts, the mitotic division lines pass through the entire egg, creating smaller blastomeres that form an interconnected structure.
Holoblastic cleavage can be further classified into radial and spiral holoblasts, depending on the pattern of cell division. In radial cleavage, the divisions are perpendicular or parallel to the animal-vegetal axis and result in stacked cells. Conversely, spiral cleavage involves oblique divisions that produce an interlocking arrangement of cells.
Overall, holoblast refers to a complete and equal cleavage of the zygote during early embryonic development, resulting in the formation of a morula composed of cells that are similar in size and structure. This term is crucial for describing and understanding the initial stages of animal embryology.
Common Misspellings for HOLOBLAST
- goloblast
- boloblast
- noloblast
- joloblast
- uoloblast
- yoloblast
- hiloblast
- hkloblast
- hlloblast
- hploblast
- h0loblast
- h9loblast
- hokoblast
- hopoblast
- hoooblast
- holiblast
- holkblast
- hollblast
- holpblast
Etymology of HOLOBLAST
The word holoblast is derived from two Greek roots: holos meaning whole or complete, and blastos meaning germ or bud.
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