Seminal vesicle fluid is rich in fructose, which sperm mitochondria use to:

1. The paired seminal vesicles contribute about 60 percent of semen volume. 2. Their secretion is rich in fructose, a sugar that fuels cellular respiration. 3. Sperm mitochondria use this fructose to generate ATP. 4. That ATP powers the flagellum, allowing movement through the female reproductive tract, not digestion of the zona pellucida (that is the acrosome's job). 5. So generating ATP for movement is correct. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 27 "The Reproductive System", p.1286 §Seminal Vesicles_