Oxygen is a requirement to produce energy; Since the brain is a massive consumer of energy; it subsequently requires huge amounts of oxygen traveling through the blood stream. Why do we need to breathe oxygen? Several factors are needed to continuously supply the cells and tissues in your body with oxygen: There must be enough oxygen in the air you are breathing; Your lungs must be able to inhale the oxygen-containing air — and exhale carbon dioxide If tissues and cells go without oxygen, then they begin to die quickly. The cellular respiration is a complex biological process that breaks down sugars, fat and proteins and transforms these materials into energy for the functioning of the organism. ... Why do cells need energy? Cellular respiration is the process cells use to make energy. When the oxygen molecules reach the body cells the process of breaking the food particles get started. For example, brain cells can only go without oxygen for three minutes before they begin to die. Muscle Cell Because muscle cells need more energy than skin cells. Muscle Cell B. (Lansing State Journal, January 31, 1996) In order for humans to survive, our bodies have figured out various ways to extract energy from out surroundings. After three minutes of no oxygen, permanent brain damage begins to spread throughout the brain's tissues. The humans breathe approximately 432 liters of oxygen per day, and that oxygen helps the tissues in the human body function properly. Skin Cell Why? Humans need oxygen to provide nutrients to all of the cells in their bodies. A. The brain uses 3 times as much oxygen as muscles in the body do Lactate buildup and lack of oxygen are the reasons for muscle fatigue and labored breathing during hard exercise. Humans need oxygen to provide nutrients to all of the cells in their bodies. When exercising, the body uses oxygen more quickly than it is taken in; anaerobic respiration provides lactate to keep the muscles moving. Overly, there are lots of other reasons why the human body requires sufficient oxygen supply to breathe and, therefore, survive, and these include: Cellular respiration; The human body cells need oxygen for aerobic cellular respiration, which is the primary process by which stored energy is converted into a usable form. - it does not need oxygen. to carry out cell activities. Firstly the question answered: Why does the brain need oxygen? This process, which is called cellular respiration, allows the cells to harness energy to perform vital functions such as the movement of materials into and out of cells. The body needs approximately 352.8 liters of oxygen per day when the body is at rest. What does glycolysis give off? Why Oxygen Is Important Oxygen is important because it makes aerobic respiration possible by accepting electrons from the transport chain in the mitochondria. 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