Final answer:
The transverse colon is the portion of the large intestine that passes horizontally across the abdominal cavity.
Step-by-step explanation:
The portion of the large intestine that passes horizontally across the abdominal cavity is the transverse colon. The large intestine is made up of several segments, including the cecum, ascending colon, transverse colon, descending colon, and sigmoid colon. The transverse colon is the part of the large intestine that travels across the abdomen from the right side to the left side.