* How does anatomy differ from physiology?

*What does anatomical position means?

* Anatomical terms such as: lateral, medial, proximal and distal, mean what?

* The 11 body systems of the human body, are what?

* The two main body cavities and what organs make up each cavity?

I woke up this morning with a pain in my lower left abdomen, located next to my belly button. As the day has progressed the pain is getting worse. I decide to take myself to the emergency room (ER) to see what the problem could be. Once at the ER I describe my symptoms and, using the knowledge that I know, specifically identify where the pain is located as well as what organs could be involved.

Why do I need to know body orientations and direction when talking about the human body?