I say you would have to lose half of your blood to lose consencnes, not sure about eyesight
never
No
the darkness??
You can lose 4 pints of blood after that you're dead.
their color
All of it
No
You will lose that heightened response in due course of time. This is the normal course of action. There can be exceptions to this.
yes you can
100 liters
Your eyesight goes as soon as you lose the strength to keep your eyelids open. Your sense of touch diminishes as your blood pressure drops and blood is reserved for the brain and heart. Your sense of smell and taste probably stay, but what use are they for communicating? Since your ears are close to your brain, they will have a decent blood supply as long as your brain has blood. And it takes no physical strength to operate the ears. If you have ever fainted, you know this first-hand; the last things and first things you will remember before and after fainting will most likely be sounds. -DJ Craig
40% of its blood volume, approximately 40 pints.