The doctor told me that writing letters usually helps. But I don't know what I'm waiting for. Maybe if I write enough, you'll respond. Perhaps it's like the story of the thousand paper cranes; if I make enough, I'll get a wish. And the only thing that I would wish for is for you to be back.

Circulatory System: The Heart

This is the first in hopefully a long series of posts about the human body. I hope for it to be an easy and comprehensive guide to help understand the wonders of our body. I'm starting with the circulatory system (my favorite!) and today we are going to focus on the heart. Since it is such a big topic, we are going to split it up into two posts. This one will focus on the structure and the functions of the different chambers.