Final answer:
The statement that hematochezia is the passage of red blood via the rectum is true, indicating lower gastrointestinal tract bleeding, and requires medical evaluation.
Step-by-step explanation:
Hematochezia is indeed the passage of red blood via the rectum and the statement is true. When this occurs, the blood in the stool will typically appear bright red. Hematochezia is commonly associated with bleeding in the lower gastrointestinal tract, specifically the rectum and anus. As food residue enters the rectum, it is stored there until defecation. If there is any damage, inflammation or lesions within the lower parts of the gastrointestinal tract, such as in cases of hemorrhoids, diverticulitis, or colorectal cancer, blood may become mixed with the stool, resulting in hematochezia. Finding blood in the stool can be an alarming sign that warrants medical attention to determine the underlying cause.