Lipid-rich extracellular matrix of the horn is called which structure?

• A. Intercellular cement
• B. Laminitis
• C. Hemorrhage
• D. White Line

Answer: (A)

The lipid-rich extracellular matrix in the horn is the intercellular cement. In the horn, keratinized cells are organized into tubules, and the spaces between these tubules are filled with a lipid-rich substance that acts as a cement, binding the horn cells together and helping to create a cohesive, waterproof barrier. This intercellular cement is what gives the horn its strength and resistance to water loss. The other terms refer to a disease (laminitis), a boundary within the hoof (white line), or bleeding (hemorrhage), not to this specific bonding material.