Dodoma is the capital of Tanzania, although Dar es Salaam is the country's largest city and its commercial capital.
Energy is defined as the ability to do work. Cellular respiration provides energy for living organisms. So, cellular respiration is important because it provides the energy for living organisms to perform all of the other necessary functions to maintain life.
It's purpose is to bring oxygen into your body. One of the products of cellular respiration is carbon dioxide. Your respiratory system also helps your body get rid of that carbon dioxide. While you have lungs, fish have gills that serve as the location for that transfer of gases. Whatever animal you study, oxygen is taken in and carbon dioxide let out.