Final answer:
The brain receives about 20% of the total blood flow from the heart per minute, which is essential for its constant energy needs and to prevent serious neurological conditions.
Step-by-step explanation:
The total percentage of blood flow to the body per minute that goes to the brain is 20%.
An adult human heart pumps about 5 liters of blood per minute, and the brain receives approximately 20% of this blood flow at any given moment. This equates to roughly 1,000 milliliters (1 liter) per minute. Ensuring a steady blood supply to the brain is critical, as the brain cannot store its own energy and requires a constant supply of glucose and oxygen from the blood.
Interruptions in blood flow to the brain can lead to serious conditions such as transient ischemic attacks (TIAs) or strokes. The blood vessels, including the internal carotid arteries and vertebral arteries, are structured in such a way to maintain constant blood flow and prevent interruptions - a critical feature for brain health and function.