Question

Which germ layer is responsible for forming the heart, muscles, and bones during the embryonic stage?

Options

• Ectoderm

• Mesoderm 

• Endoderm

• Epiderm

Answer 1

Mesoderm

Explanation:

The mesoderm is the middle layer of the three germ layers that forms during weeks 3-8. It gives rise to the heart, muscles, bones, and other structural tissues of the body.