Question

Most of visceral organs of frog's body are derived from embryonic

• A. Ectoderm
• B. Endoderm
• C. Mesoderm
• D. Ectomesoderm

Answer 1

Answer: (C)

Mesoderm

During embryonic development, the germ layers represent the three different cell types that will continue to differentiate during development to give rise to more than 200 different types of cells that make up the body of adult frog. The endoderm lineage represents the inner-most layer of cells following gastrulation. These cells are the first to migrate through the primitive streak; they will give rise to cells that will make up the gut, the liver, and the lungs. The cells that migrate into the embryo later and that position themselves between the endoderm and surface layer become the mesoderm. Most of the body is derived from mesoderm because this layer forms major tissues of the body. The adult cells that the mesoderm will give rise to include those that will make up the skeleton and skeletal muscle, the heart, the blood, and the kidneys. The cells that remain on the surface of the embryo become the ectoderm. The adult cells that this lineage of cells will give rise to include the skin and central nervous system.

Thus, the correct answer is option C.