Optometry Admission Test (OAT) Practice

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Which embryonic layer is involved in creating muscles and skeletons?

  1. Ectoderm

  2. Endoderm

  3. Mesoderm

  4. Germ layer

The correct answer is: Mesoderm

The mesoderm is the correct choice because it is the embryonic layer responsible for the development of muscles, bones, and the skeletal system. During embryonic development, the mesoderm forms a variety of structures in the body, including the muscular system, the skeletal system, cardiovascular system, and parts of the urogenital system. This layer lies between the ectoderm, which gives rise to the nervous system and skin, and the endoderm, which forms the lining of the gut and other internal organs. Understanding the role of the mesoderm in development is crucial for comprehending how body systems differentiate and function.

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