Human respiration
This physical and biochemical process transports oxygen from the air that surrounds us into the tissue cells of our body. It’s absolutely vital to an organism’s survival
The primary organs used for respiration in humans are the lungs. Humans have two lungs, with the left lung being divided into two lobes and the right into three. The lungs have between 300 and 500 million alveoli, which are where gas exchange occurs.
Respiration of oxygen breaks into four main stages: ventilation, pulmonary gas exchange, gas transportation and peripheral gas exchange. Each stage is crucial in getting oxygen to the body’s tissue and removing carbon dioxide. Ventilation and gas transportation need energy to occur. The diaphragm and the heart are used to facilitate these actions, whereas gas exchanging is passive. Air is drawn into the lungs at a rate of between 10 and 20 breaths per minute while resting, through either your mouth or nose by diaphragm contraction, and travels through the pharynx, then the larynx, down the trachea and into one of the two main bronchial tubes. Mucus and cilia keep the lungs clean by catching dirt and dust particles and sweeping them up the trachea.