The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.
We at Bright Side invite you to take a look at what you can expect from your body when you finally pull yourself together and start training. Illustrated by Ekaterina Gapanovich for Bright Side.