Final answer:
Celiac, SM, and IM plexi refer to nerve networks—the celiac plexus, superior mesenteric plexus, and inferior mesenteric plexus—involved in regulating digestion and function of abdominal organs.
Step-by-step explanation:
What are celiac, SM, and IM plexi? These terms refer to complex networks of nerves located in the abdominal area of the human body. The celiac plexus, also known as the solar plexus, is a large cluster of nerve fibers and ganglia that supplies the abdominal viscera. It's primarily involved in the control of the internal organs of digestion such as the stomach, liver, pancreas, and intestines.
The superior mesenteric (SM) plexus is responsible for providing nerve supply to the upper parts of the intestines, including the jejunum, ileum, and colon. Lastly, the inferior mesenteric (IM) plexus supplies the lower parts, specifically the descending colon and rectum. These plexi are part of the autonomic nervous system and play vital roles in managing digestion and organ function.