Why is the mitochondria arranged around the filament near the tail of the sperm.

Mitochondria release energy from glucose since they're near the tail where the energy is needed. They are packed around the filament.

Answer: A small middle portion of the sperm contains the mitochondria. The tail of the sperm, sometimes called the flagellum, is a slender, hairlike bundle of filaments that connects to the head and middle portion. The tail gives the sperm cell movement. It whips and undulates so that the cell can travel to the egg.