Which division is NOT part of the autonomic nervous system?

The correct choice identifies the peritoneal division as not being part of the autonomic nervous system. The autonomic nervous system is fundamentally divided into the sympathetic and parasympathetic divisions, which regulate involuntary bodily functions.

The cranial division includes cranial nerves that contribute to the parasympathetic pathways, particularly influencing functions such as heart rate and digestive functions. The thoracolumbar division refers to the sympathetic nervous system, which originates from the thoracic and lumbar regions of the spinal cord and is involved in the "fight or flight" response. The cervical division encompasses nerves located in the neck region that also contribute to both sympathetic and parasympathetic functions.

In contrast, the term "peritoneal" is not recognized as a division of the autonomic nervous system or related to any part of the sympathetic or parasympathetic pathways. Instead, the peritoneum is a membrane in the abdominal cavity. This distinction highlights that the peritoneal division does not function within the context of the autonomic control mechanisms of the body.