Answer:
I transfer oxygen from the atmosphere to your blood
People need me yet they give me away every day.
I sit in a corner while traveling around the world. What am I?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away yet lust for me keeps me locked away.
You went into the woods and got me. You sat down to seek me. You brought me home because you couldn't find me.
Which popular cheese is made backwards?