The gem layer that gives rise to muscles and internal organs other than those organs of the digestive tract
is the mesoderm. The mesoderm is one of the three primary germ layers that form during early embryonic development, along with the ectoderm and endoderm. It gives rise to a wide range of tissues and structures, including muscle, bone, cartilage, blood, connective tissue, and the heart and other organs of the circulatory system.
Within the mesoderm, specific regions called somites give rise to the muscles and connective tissue of the body. Myogenesis, the process by which muscle tissue is formed, occurs within these somites. The mesoderm also gives rise to the internal organs other than those of the digestive tract, such as the kidneys, lungs, and reproductive organs.
Overall, the mesoderm plays a crucial role in the development of the musculoskeletal system and internal organs, contributing to the overall structure and function of the body.