Which germ layer develops into the nervous system, skin, and sensory organs?

The germ layer that develops into the nervous system, skin, and sensory organs is the ectoderm. During embryonic development, the ectoderm is the outermost layer among the three primary germ layers. It gives rise to a variety of structures, including the central and peripheral nervous systems, as well as the epidermis, which is the outer layer of skin. Additionally, the ectoderm is responsible for forming sensory organs such as the eyes, ears, and nose, making it essential for the development of various sensory functions in the organism.

In contrast, the mesoderm, which is the middle germ layer, primarily develops into muscles, bones, and the circulatory system. The endoderm, the innermost layer, contributes to the formation of internal structures such as the gastrointestinal tract, liver, and lungs. The cerebrum, while a crucial part of the brain and responsible for many higher-order functions, is not a germ layer but rather a structure that develops from the ectoderm during the formation of the nervous system.