The rectum is short; only about 6 inches long.
The rectum allows the passage of excrement out of the animal. Without the rectum, the pig would not be able to pass feces properly.
The length of a human rectum is about 12 centimeters, or 4.7 inches long.
around 8".
Villi
The rectum can also be known as the anus or colon.
Sperm cannot survive for long outside of the body, and the rectum is not a suitable environment for sperm to live. Once ejaculated into the rectum, sperm will die quickly due to the acidic nature of the environment.
The rectum is 4-5 inches long, it's a muscle that expels waste. There's not much about it.
The average length is 10-15cm from the anal verge. This is about the same whether you are male or female although some differences apply based on a persons height (i.e., may be shorter is stature is less).
eventually you get constipated and then a bellyache.
First, you probably mean the rectum, which is inside the body. The anus is the opening to the rectum. But.. You can't make the rectum 'longer'. It's like asking, How can I make my finger longer? or asking, How can I make my nose grow? The rectum like the anus can be stretched in width but not lengthened. Important--- The rectum and anus can be permanently damaged. That damage can result in constipation and leaking of softer stool.
long
The length varies, but it is approximately 3 to 6 inches long.