What structure does the distal end of the descending colon connect to?

The correct answer, which indicates that the distal end of the descending colon connects to the sigmoid colon, is rooted in the anatomical configuration of the human large intestine. The colon consists of four main regions: the ascending colon, transverse colon, descending colon, and sigmoid colon.

The descending colon is the segment that extends from the splenic flexure down to the sigmoid colon. It plays a vital role in the absorption of water and electrolytes, as well as the storage of waste material before it is expelled from the body. At its inferior end, the descending colon transitions into the sigmoid colon, a part shaped like the letter "S." The sigmoid colon then connects to the rectum, where the final portion of stool is stored before elimination.

In contrast, the other structures listed do not serve as the connection point for the distal end of the descending colon. The ascending colon is located at the opposite end of the large intestine, starting from the cecum and rising up to the transverse colon, while the cecum is the starting segment of the large intestine, providing no direct connection to the descending colon. Understanding this anatomical sequence is essential for comprehending the overall structure and function of the human digestive system.