Pharmacology for Nurses

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Rectum

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Pharmacology for Nurses

Definition

The rectum is the final section of the large intestine, located between the sigmoid colon and the anus. It serves as a temporary storage area for feces before elimination from the body.

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5 Must Know Facts For Your Next Test

  1. The rectum is approximately 12 cm (4.7 inches) long and 3-4 cm (1.2-1.6 inches) in diameter.
  2. The rectum has a J-shaped curve that allows it to accommodate the storage of feces before elimination.
  3. The rectum is lined with a mucous membrane that helps lubricate the passage of stool.
  4. The rectum is surrounded by a ring of muscle called the anal sphincter, which controls the release of feces.
  5. The rectum is an important part of the defecation process, as it senses the presence of stool and initiates the urge to have a bowel movement.

Review Questions

  • Describe the anatomical location and function of the rectum within the gastrointestinal system.
    • The rectum is the final section of the large intestine, located between the sigmoid colon and the anus. It serves as a temporary storage area for feces before elimination from the body. The rectum has a J-shaped curve that allows it to accommodate the storage of feces, and it is lined with a mucous membrane that helps lubricate the passage of stool. The rectum is an important part of the defecation process, as it senses the presence of stool and initiates the urge to have a bowel movement.
  • Explain the role of the anal sphincter in the function of the rectum.
    • The rectum is surrounded by a ring of muscle called the anal sphincter, which controls the release of feces. The anal sphincter plays a crucial role in the defecation process by maintaining continence and allowing for the controlled release of stool. When the rectum senses the presence of feces, the anal sphincter relaxes to allow for the passage of stool. The coordinated action of the rectum and anal sphincter ensures the proper elimination of waste from the body.
  • Analyze the importance of the rectum in the overall functioning of the gastrointestinal system.
    • The rectum is a vital component of the gastrointestinal system, as it serves as the final storage and elimination point for waste. By temporarily holding feces and initiating the urge to have a bowel movement, the rectum ensures the efficient and controlled release of waste from the body. This process is essential for maintaining digestive health, preventing constipation, and supporting overall well-being. The rectum's anatomical features, such as the J-shaped curve and the anal sphincter, work in coordination to facilitate this critical function within the gastrointestinal system.
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