If the brain is responsible for hormone distribution, neuronal movements and blood flow in the body, why can’t we control it?

Question

Thanks to our brain, we can control raising our right hand or opening and closing our eyes whenever we want.

Why can’t we control the blood pumped in our body or the division of our cells with the same brain?

In: Biology

Answer 1

Conscious thought happens in the cortex. Anything that happens elsewhere in the brain isn’t.

Blood pressure, heart rate, respiration, just basically all the behind the scenes work your brain does all happens in areas deep in the brain way below the cortex. Areas such as the cerebellum, basal ganglia, pons, midbrain, medulla.

Even sensations. For them to be conscious they have to reach the cortex. Temp, pressure, vibration, touch, pain, sight, hearing all of that goes up to a specific area in the cortex. But a lot of sensations like the amount of CO2 in your blood goes to a subconscious part of your brain, you don’t feel it but your body does know that.