NEET BIOLOGY

Detailed explanation-1: -Most living things need oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into energy. Humans get the oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.

Detailed explanation-2: -All cells, including muscle cells, require oxygen to function. Energy inside cells comes in the form of adenosine triphosphate (ATP), a molecule that carries energy within cells. Most of our ATP is created through the breakdown of metabolic substrates (food) using oxygen, resulting in CO2 and water.

Detailed explanation-3: -Every cell in the body requires oxygen for respiration so that sufficient energy can be produced. Carbon dioxide, a waste product, is also produced and needs to be removed.

Detailed explanation-4: -All living organisms need energy to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is the set of life-sustaining chemical processes that enables organisms transform the chemical energy stored in molecules into energy that can be used for cellular processes.