Embryogeny

Embryogeny refers to the process of development of an embryo from fertilization of the ovum to the fetus stage. It is a crucial part of reproductive biology and developmental biology.

Overview

Embryogeny begins with the fertilization of an ovum, which then becomes a zygote. The zygote undergoes rapid cell divisions in a process known as cleavage to form a blastula. The blastula undergoes gastrulation to form a gastrula, which will eventually develop into a fetus.

Stages of Embryogeny

Fertilization

Fertilization is the fusion of the sperm and ovum to form a zygote. This is the initial stage of embryogeny.

Cleavage

Following fertilization, the zygote undergoes a series of rapid cell divisions known as cleavage. This results in the formation of a blastula.

Gastrulation

The blastula then undergoes a process known as gastrulation, where it transforms into a gastrula. This process involves significant morphological changes and is crucial for the formation of the three primary germ layers: the ectoderm, mesoderm, and endoderm.

Organogenesis

Organogenesis is the process by which the germ layers develop into the internal organs of the organism. This is a complex process that involves cell differentiation and morphogenesis.

See Also

• Developmental biology
• Reproductive biology
• Zygote
• Blastula
• Gastrula
• Fetus

References

Embryogeny Resources
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