In what specific part of the male reproductive system do maturing sperm gain increased motility and their ability to swim

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.