The door to the Renal Unit is on your right. The door to the Renal Unit is to your right. If you say, "The door to the Renal Unit is on your right hand", it means on your hand, set in your skin, is a tiny door which leads to the Renal Unit. The door is part of your hand. Curiouser and curiouser!

... on your right.

Hi! I'm Ron from New York, USA. I am happy to help you with your spoken English if you need help. I also love to make new friends everywhere in the world! If you want help, please add me to Skype so we can chat better: ron.jenkins86 Thanks and have a great day! :)

... to your right.

... on the right.