* The Cecum: This large, pouch-like organ is located at the junction of the small and large intestines. It contains a large population of microbes that break down cellulose and other complex carbohydrates found in roughage. This fermentation process releases volatile fatty acids (VFAs) that provide energy for the horse.
* Large Intestine: The cecum is part of the large intestine. The rest of the large intestine (colon and rectum) also plays a role in digesting roughage. It absorbs water and electrolytes, further breaking down plant matter and forming fecal matter.
In short: The cecum is a crucial component of the horse's digestive system for processing roughage, but it's not the only organ involved. The entire large intestine works together to effectively digest plant material.