Final answer:
The germinal epithelium divides to form three primary germ layers known as the ectoderm, mesoderm, and endoderm, which will differentiate into the nervous system, muscle and skeletal structures, and internal organs, respectively.
Step-by-step explanation:
The germinal epithelium divides to form three primary germ layers during the process of embryonic development. These layers are known as the ectoderm, mesoderm, and endoderm. Each germ layer is predestined to differentiate into specific structures within the embryo. For instance:
- The ectoderm contributes to the formation of the central and peripheral nervous systems, sensory organs, and the epidermal tissues such as skin, hair, and nails.
- The mesoderm differentiates to become the skeletal system, muscles, connective tissue, heart, blood vessels, and kidneys.
- The endoderm will develop into the epithelial lining of the gastrointestinal tract, liver, pancreas, and the lungs.
Through the process of gastrulation, these germ layers further organize into the tissues and organs that make up the complete organism.