What am 急1.You can feel me but you can’t see me.I am very st

What am 急
1.You can feel me but you can't see me.I am very strong and work as a pump.
2.I am on your head.I feel soft.I can be long or short.black or brown.
3.I connect your hand with the rest of your arm.I sometimes wear a watch.
4.If you break one it hurts.You have 206 of them in your body.
5.I'm in the middle of your face.You can smell things with me.

1 heart
2 hair
3 wrist
4 bones
5 nose