Back dimples are the two indents on the lower back where the backbone meets the hip. People find these dimples to be very hot (only because it means you have a nice booty). It's a very rare feature on the back. Some people believe that back dimples are genetic like, a cleft chin. Men love to place their fingers in them as they are holding women.Then there are those who believe that it can be achieved through exercise (given the fact that most people with this feature have lean bodies).
When you inhale, your diaphragm contracts and moves down, making  more space in your chest. Air rushes in to fill this space, and you  inhale. When you exhale, your diaphrag â¦ m relaxes and moves up,  squeezing the carbon dioxide out of your body. 46 people found this useful.
The diaphragm also contracts to extend the cavity further downwards. Due to the function of the pleural membrane, the size of the lungs is increased which, in turn, creates an area of lower air pressure inside the lungs; hence, air is drawn into the lungs. Exhalation is the process of expelling air out of the lungs. For this to occur, the air pressure inside the lungs must be higher than that of the external atmosphere as air flows from areas of higher pressure to ones of lower pressure.