Question

O que é segmentação holoblastica por que tem esse nome?

Answer 1

Resposta:

The divisions that occur during segmentation are called cleavages, and the cells that form are called blastomeres.

In the Animal Kingdom, the difference in the quantity and distribution of the calf in the egg determines differences in segmentation, the lower the speed of division. As a result, we can consider two basic types of segmentationHoloblastic targeting

Holoblastic segmentation occurs in the alécites, in the isolecites (or oligolecitos) and in the heterolecitos, and can be subdivided in three types, based on the size of the cells that are formed from the third cleavage (when the cell division plan changes):

equal holoblastic, in which, with the third cleavage, eight equal blastomers are formed; occurs in alkyd eggs and some oligoliths;uneven oloblastic, in which, with the third cleavage, blastomers of different sizes are formed (four smaller ones: micromers; and four larger ones: macromers); It occurs in all heterolithic eggs and in some oligoliths;