Score is an old word for the number 20. It is used in the famous expression from the Gettysburg Address: Four score and seven years ago.... = (4*20+7)years = 87 years. And in the Bible: âthree score years and tenâ meaning: âseventy years oldâ (3*20+10) (Psalm 90). This was thought to be a normal life span.
It may surprise you to know that your respiratory system does a lot more than just coordinate the oxygen that goes in and out of your lungs. Your respiratory system works with the muscular, skeletal and circulatory systems of your body in order to help you speak, smell and breathe.
The Respiratory System - Structure And Function. 1  The respiratory system is the system in the human body that enables us to breathe. The act of breathing includes: inhaling and exhaling air in the body; the absorption of oxygen from the air in order to produce energy; the discharge of carbon dioxide, which is the byproduct of the process.