I transfer oxygen from the atmosphere to your blood. What am I?

Answer: Lungs

More What am I ? with answers

More What am I ?

I travel in a gaggle. What am I?
I turn around once. What is out will not get in. I turn around again. What is in will not get out. What am I?
I turn everything around, but I cannot move. When you see me you see you! What am I?
I twist and turn and leaves a loop. What am I?
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night.
I warn you about meetings, and I assist you in your life, I can help you do most of your work, unless I have a bug. What am I?
I was carried into a dark room, and set on fire. I wept, and then my head was cut off. What am I?
I was cracked by Indiana Jones. What am I?
I was known to Greek philosophers a thousand years ago, I have numbers all in a line, and I can tell you if rain will turn to snow. What am I?
I was not born, but I am here. I have no name, but I am given many. I was made by science and life. What am I?
I watch over you as you sleep without leaving a trace. It only takes one small step to land on my face. What am I?
I wave my hands at you, But I never say goodbye. You’re always cool with me, Even cooler when I’m high. What am I?