Question

What are the three primary germ layers formed during gastrulation?

Options

• Epidermis, muscle, and nervous tissue

• Trophoblast, cytotrophoblast, and syncytiotrophoblast

• Ectoderm, mesoderm, and endoderm

• Amnion, chorion, and allantois

Answer 1

During gastrulation, three primary embryonic germ layers are formed. The ectoderm gives rise to the epidermis and nervous system. The mesoderm forms muscles, bones, blood, and other structures. The endoderm lines the digestive and respiratory tracts and forms the liver and pancreas.