The frog is produced by which corium?

• A. Coronary corium
• B. Frog corium
• C. Solar corium
• D. Perioplic corium

Answer: (B)

The frog is produced by the frog corium, the living tissue under the frog horn that generates its keratinized form. Each region of the hoof has its own corium that builds a specific part: the coronary corium forms the hoof wall at the top, the solar corium forms the sole, and the perioplic corium creates the periople around the coronet. So the frog horn, and the frog itself, come from the frog corium, not from the coronary, solar, or perioplic corium.