The part of the nervous system that allows the brain to regulate digestion, heart rate, and respiration without our conscious attention is the?

Answer: The correct answer is Autonomic Nervous System

Explanation:

The autonomic nervous system are mainly involuntary i. e not under conscious control.

Also, it connects the central nervous system with the following:

- glands that regulate digestion

- smooth muscles that regulate respiration and the breathing process.

- cardiac muscles of the heart that regulate heart rate.