Question

The epithelial tissue from which carcinomas arise is derived from which embryonic germ layer(s)?

Options

• Endoderm and mesoderm

• Mesoderm only

• Ectoderm and endoderm

• Ectoderm and mesoderm

Answer 1

Carcinomas originate in epithelial tissue derived from the ectoderm and endoderm germ layers. In contrast, connective tissue — the origin of sarcomas — is derived from the mesoderm, which is a key embryological distinction between these two cancer classes.