embrüogeneesis

Embryogenesis is the process by which an embryo develops. It begins with fertilization, the fusion of a sperm and an egg cell to form a zygote. This single-celled zygote then undergoes rapid cell division called cleavage, increasing the number of cells without a significant increase in overall size. Following cleavage, the cells begin to differentiate, meaning they start to specialize into different types of cells that will form various tissues and organs. This stage involves the formation of germ layers, typically ectoderm, mesoderm, and endoderm, from which all the body's structures will arise. These germ layers then undergo further development through processes like gastrulation, where the fundamental body plan is established, and organogenesis, the formation of organs. The entire process is tightly regulated by genetic and environmental factors, ensuring the proper development of a viable organism. Embryogenesis continues until the embryo reaches a stage where its major organs and body structures are formed.