Anatomy of Motion on Instagram: "The diaphragm is the backbone of your ability to breathe. It is located just below your lungs, and when relaxed, it has a shape of a dome. However, as soon as you feel the need for fresh oxygen, it contracts, creating a flat surface. This inhalation action lowers the pressure in your chest, causing your lungs to expand. Exhaling restores the diaphragm's original, relaxed shape, which increases the pressure in your chest and causes your lungs to contract again. #d