The Central Sulcus is where the ducts of the glands of the Frog empty. The bacteria on the Central Sulcus surface uses the glandular secretion to produce a scent, so that horses can track/communicate with each other.
For the most part the hoof does not contain glands, the exception being the frog, which contains merocrine glands (A cell is classified as merocrine, if the secretions of that cell are excreted via exocytosis from secretory cells into an epithelial-walled duct or ducts and then onto a bodily surface). The frog is the softest part of the hoof, even though it is made up of the same fibrous material as the rest of the hoof. It’s softer and more pliable because it contains oil glands and more moisture than the hoof horn and sole. In moist conditions the frog might be nearly 50% water, by weight.
This is how Morris H. Morgan, Ph. D, translated Xenophon’s Greek text in 1893:
The Greek word used by Xenophon is ye\dwy, which literally means " swallow and the frog was so named from its resemblance to the forked tail of the bird.
For the most part the hoof does not contain glands, the exception being the frog, which contains merocrine glands (A cell is classified as merocrine, if the secretions of that cell are excreted via exocytosis from secretory cells into an epithelial-walled duct or ducts and then onto a bodily surface). The frog is the softest part of the hoof, even though it is made up of the same fibrous material as the rest of the hoof. It’s softer and more pliable because it contains oil glands and more moisture than the hoof horn and sole. In moist conditions the frog might be nearly 50% water, by weight.
This is how Morris H. Morgan, Ph. D, translated Xenophon’s Greek text in 1893:
The Greek word used by Xenophon is ye\dwy, which literally means " swallow and the frog was so named from its resemblance to the forked tail of the bird.