The scientific study of energy transfer within biological systems is called bioenergetics. This field examines how organisms convert and utilize energy from food sources to fuel metabolic processes. Bioenergetics combines principles from thermodynamics, biochemistry, and physiology to understand how energy flows through living systems. This understanding is essential for exploring topics like cellular respiration, photosynthesis, and energy balance in ecosystems. Insights from bioenergetics can inform health, nutrition, and environmental sustainability practices.