Automatically? The cells live.
Almost everything else requires feedback controls of one type or another:
for instance ; temperature, pH, respiration, blood flow, balance.
Even things like walking or driving a car become "automatic" once you learn how.
The word you are looking for is "involuntary." Involuntary actions are those that your body performs automatically, but you can also control voluntarily if needed.
Breathing is both a voluntary and involuntary action. We can control our breathing consciously, but it also happens automatically without us having to think about it.
An example of involuntary muscle in the human body is the smooth muscle found in the walls of internal organs such as the stomach and intestines. These muscles work automatically without conscious control.
When you sweat, your body releases fluid through sweat glands to cool down. This occurs because sweating helps regulate your body temperature by evaporating heat from your skin.
When you squish a cockroach, its body is crushed and its internal organs are damaged, leading to its death.
No special action is required to care for the sciatic nerve, the body does this automatically. Thus your question is meaningless.
Listening
Listening
You automatically become Aitor
you automatically blink because of you reflexes that your body has.
breathing
yes
A reflex action is a movement your body does automatically. The body moves almost immediately in response to specific stimulation.
There are some things that your body does automatically. Breathing, blood flow, nerves transmitting pain and feelings to the brain, and general internal and external movement of joints are things the body does automatically when there is no medical issues present.
The fight or flight response is an automatic thing that happens to the human body when it is faced with danger at intense levels. You will automatically run away or fight the danger.
You can't, it happens automatically
it will automatically die...