What is the approximate length of the rectum?

The length of the rectum is typically between 12 to 15 centimeters in adults. This segment of the gastrointestinal tract connects the sigmoid colon to the anal canal and serves as a temporary storage area for feces before they are expelled during defecation. Understanding the anatomy of the rectum is essential for healthcare professionals, particularly in fields related to gastroenterology, surgery, and nursing, as it plays a crucial role in digestive health and can be involved in various medical conditions.

The other ranges provided in the options do not accurately reflect the typical length of the rectum. A length of 5-10 centimeters would be too short and does not align with anatomical studies, while 10-12 centimeters is on the lower end but does not encompass the full average range. Similarly, a measurement of 15-20 centimeters exceeds the usual rectal length, making the range of 12-15 centimeters the most accurate and relevant choice. This understanding is important for procedures such as rectal examinations, colonoscopies, or surgeries involving the lower gastrointestinal tract.