Science on Instagram: "Human respiration is the process by which humans take in oxygen and release carbon dioxide to produce energy. It involves two main steps: • External respiration (breathing): Inhalation of oxygen-rich air into the lungs and exhalation of carbon dioxide. • Internal respiration (cellular): Oxygen is transported by blood to cells, where it helps break down glucose to release energy (ATP), producing carbon dioxide and water as by-products. • Follow - @science_explainaition • #i