The proximal colon, also known as the ascending colon, is the first part of the large intestine. It connects to the cecum, which is the pouch that receives waste from the small intestine. The primary function of the proximal colon is to absorb water and electrolytes from the undigested food, helping to form solid waste. Located on the right side of the abdomen, the proximal colon extends upward toward the liver. It plays a crucial role in the digestive system by preparing waste for further processing in the transverse colon. Proper function of the proximal colon is essential for overall digestive health.