Energy production at the cellular level - Another astounding creation by an awesome God!

The past several weeks I have been studying for another certification for personal training.  As I studied the physiology of the human body (as I have many times before), I was struck by the intricacy in the way our bodies were created and wanted to share a little with you.   

Consider the way our cells use our food to create energy for our bodies.  First our body breaks the food down into nutrients that the cell can easily break down:  glucose, fatty acids and amino acids.  The respiratory and cardiovascular systems of the body work together to bring oxygen to the cellular level where a tiny sub-cellular structure called the mitochondria is working to break down the glucose, fatty acids and amino acids to produce ATP, the main source of energy for the body. 

In normal everyday life and during low to moderately intense exercise, the cells use oxygen to break down the nutrients and produce ATP.  The cells are able to produce ATP at a steady rate with the only waste product being carbon dioxide, which the body is able to easily rid from the cells.  However, in the event that the body is no longer able to keep up with the oxygen demands of the cell to create ATP in this way, the cell simply shifts to making ATP without oxygen.  When ATP is produced without oxygen, the process creates a bi-product called lactic acid.  Lactic acid builds up in the muscles and causes the feeling of fatigue in the muscles which tells our bodies to slow down or stop the activity so that the body can go back to creating energy using oxygen to break down the nutrients.

At the same time as studying for this exam, I am also studying the book of Genesis and how God created the world.  I can not stop thinking about how intricately God created us and how well it all seems to work!  I find it shocking that anyone could believe that this all happened by chance!  The many systems of the body work hand in hand to help the cells produce energy seamlessly.  That is nothing short of a miracle to me and I know that only the holy God of the Bible, our Creator could be responsible!