Bowel Disease 2025 Study Guide
,NR507 Week 5 Edapt Inflammatory Bowel Disease
Introduction to Inflammatory Bowel Disease
The duodenum is the first part of the small intestine and is located immediately after the stomach. The
jejunum is the second part of the small intestine. The ileum is the final section of the small intestine,
connecting to the cecum, which is the beginning of the large intestine (colon).
The cecum is the first part of the large intestine, situated at the junction of the ileum and the
ascending colon. The colon, also known as the large intestine, is divided into several segments: 1) the
ascending colon begins at the cecum and travels upward on the right side; 2) the transverse colon
extends horizontally across the abdomen; 3) the descending colon travels downward on the left side;
and 4) the sigmoid colon forms an S-shaped curve leading to the rectum.
The rectum is the final part of the large intestine before the anus. It serves as a temporary storage site
for feces. The anus is the opening at the end of the digestive tract through which feces are expelled
from the body.
, Crohn's disease is characterized by transmural (or continuous mucosal) inflammation that can affect
any part of the gastrointestinal tract, leading to skip lesions and patchy involvement.
It is not limited to the colon, can involve all layers of the bowel wall, and may affect areas beyond the
rectum. Understanding these key features helps in differentiating Crohn's disease from other
gastrointestinal conditions.
The nurse practitioner (NP) anticipates the rectum and sigmoid colon to be affected for a client with
ulcerative colitis because the typical pattern of involvement is continuous and typically starts in the
rectum and extends proximally.
Distinguishing between ulcerative colitis and other inflammatory bowel diseases, such as Crohn's
disease, is crucial for appropriate management. Crohn's disease can affect any part of the
gastrointestinal tract, has a more heterogeneous pattern, and is more likely to involve the ascending or
transverse part of the colon.
Normal Physiology of the Intestines
The function of the intestines is to break down and absorb water and nutrients from food. Review the
components and functions of the small intestine and the large intestine below.
Small Intestine