Skin
The retina at the back of the eye is light-sensitive.
The most sensitive part of a dog's body is typically their nose.
pupil
The retina at the back of the eye is light-sensitive
the neck is the most sensitive part of your body - WRONG The correct answer is your lip then thumb
the pupil
the chloroplast
clitoris
The eyes.
Rhodopsin
The brain is not the most sensitive organ in the body. It actually only interprets what the sensory system information brings to it. You could poke a fork into the brain and it would feel no pain, flash a light on it, put a really smelly sustenance on it, put pressure on it, touch it, yell at it and it would not even notice that. So the sensory part of the nervous system is the most sensitive part of the human body.
The light-sensitive part of the eye, called the retina, detects light and converts it into electrical signals that are sent to the brain. This process allows us to see and interpret the world around us.