You need thousands of me to create a digital image. What am I?

Answer: Pixel

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You put me on a table and cut me, but you don't eat me. What am I?
You saw me where I could not be. Yet, often you see me. What am I?
You see me a lot, especially at night. I protect something special. Many shut me in fright. What am I?
You see me in the rainbows, you see me on Valentine’s Day, you see me in a busy street, and my blood turns this color when oxygen and I meet. What am I?
You shoot me but I don't die. You hang me but I don't die. What am I?
You take my clothes off when you put your clothes on. What am I?
You throw away my outside, you cook my inside. Then you eat my outside and you throw away my inside. What am I?
You throw me out when you use me and take me in when you are done. What am I?
You turn me over after you have traveled far. What am I?
You use a knife to slice my head and weep beside me when I am dead. What am I?
You use a knife to slice my head but you weep beside me when I am dead. What am I?
You use lots of me, yet right you use me when you're done. What am I?