Humans and plants depend on each other through their organ systems. Plants take in carbon dioxide that humans breathe out, and they release oxygen through photosynthesis, which humans need to breathe. In return, humans and animals help spread plant seeds and provide carbon dioxide for plants to survive. This cycle keeps both living things healthy and balanced in nature.
While humans and plants have distinct organ systems, they exhibit a form of interdependence. Plants produce the oxygen humans need for respiration and the food that many animals, including humans, consume. Conversely, humans exhale carbon dioxide, a gas essential for plant photosynthesis. This exchange forms a fundamental cycle of energy and resources between the two.