Question

Why is a respiratory system necessary??

Answer 1

These include the nose, pharynx, larynx, trachea, bronchi and lungs. Therespiratory system does two veryimportant things: it brings oxygen into our bodies, which we need for our cells to live and function properly; and it helps us get rid of carbon dioxide, which is a waste product of cellular function.J

Answer 2

respiration is oxidative breakdown of respiratory substrate, it is a biochemical process
it is necessary to produce energy for doing various types of activities.....