Blastula

The blastula is an early stage in embryonic development, typically occurring after the morula stage (a solid ball of cells) and before gastrulation. It's characterized by a spherical, hollow ball of cells, the blastomeres, surrounding a fluid-filled cavity called the blastocoel. The blastula marks a crucial point in development where cell differentiation begins and the basic body plan starts to take shape. It's the stage at which gene expression is significantly altered, guiding the embryo toward its ultimate fate. This hollow structure allows for cell movements essential during gastrulation, forming the different germ layers.

Blastula meaning with examples

• The biologist observed the dividing cells progressing from a morula to a blastula, noting the formation of the central, fluid-filled cavity. This transition in the early embryonic stage provided key clues in the team's research. The blastula demonstrated that cellular changes were occurring within. Further analysis showed unique cell structures to develop in time.
• In a comparative study of different animal species, the researchers examined the blastula stages to compare developmental rates and cell organization. They were looking at blastula symmetry and the formation of the blastocoel cavity. The comparison offered insightful clues about the blastula’s form in each species.
• After in vitro fertilization, the embryos were carefully monitored; a healthy blastula formation was a positive indicator of successful development. During this stage in the embryonic cycle, changes became more complicated. Proper cellular activity was a must for it to be healthy.
• The embryologist experimented with various growth factors to understand their influence on the blastula's development. Growth factors were added to the blastocoel, and the researcher monitored how it affects its formation. He observed a critical period where differentiation of cells took place.
• During a lesson on developmental biology, the professor used a model of a blastula to explain the importance of the blastocoel and its role in cell migration. He also spoke about cell division. Then spoke about different stages.