The respiratory system's main function is to exchange oxygen and carbon dioxide gases within the body. The organs that make up the respiratory system include the nose, pharynx and larynx, the trachea, bronchi, and the lungs. Each of these organs help with the process of breathing and/or the exchanging of gases within them.
Plants make their food using a process called, photosynthesis. Some plants reproduce by making seeds or spores. Another one is adaptation, which helps the plants store water and to reduce water loss. They have vascular tissue and use pollen and seeds to reproduce. However, some plants have a complex life cycle that includes the sporophyte and gametophyte stages.