Similarly, contraction of the external intercostal muscles moves the ribs upwards and outwards. The true respiration, resulting in the release of energy, occurs in the tissues by the exchange of oxygen of blood for the carbon dioxide of the tissues. Air enters the nose through the nostrils. ADVERTISEMENTS: Human Respiratory System and it’s Mechanism! Animal tissues: The cheek cells are a type of epithelial tissue, while blood is a kind of connective tissue. The exchange of oxygen of the air for the carbon dioxide of the blood takes place in the respiratory organs and is known as external respiration. When it contracts, it becomes flattened and therefore increases the volume of the thoracic cavity. Respiratory gas transport. This is known as internal or tissue respiration. The human respiratory system consists of a pair of lungs and a series of air passages leading to the lungs. Epithelial tissue: This tissue covers the surface of the body and lines the internal organs. ; Nasal chamber – which is lined with hair and mucus to filter the air and remove dust and dirt. Oxygen and carbon dioxide must be transported to and from the lungs and tissue cells of the body via the bloodstream. In health the two pleurae are in contact. Gas exchange between the pulmonary blood and alveoli must take place. External respiration. Pleura, plural pleurae, or pleuras, membrane lining the thoracic cavity (parietal pleura) and covering the lungs (visceral pleura). The parietal pleura folds back on itself at the root of the lung to become the visceral pleura. The respiratory system, which includes air passages, pulmonary vessels, the lungs, and breathing muscles, aids the body in the exchange of gases between the air … The lungs are the main part of your respiratory system. The entire respiratory tract (passage) consists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. When air passes through the nose, […] Here is how lungs work as the center of your breathing, the path a full breath takes in your body, and a 3-D model of lung anatomy. Muscles of the Respiratory System. The respiratory tract in humans is made up of the following parts: External nostrils – For the intake of air. At systemic capillaries, gas exchanges must be made between the blood and tissue cells. Human respiratory system - Human respiratory system - The mechanics of breathing: Air moves in and out of the lungs in response to differences in pressure. There are two other types of animal tissue—muscular and nervous. For Cellular respiration C6H12O6+6O2 ---> (many enzymes many steps)---> 6CO2+6H2O+energy(used to make ATP) + heat Why do we need to get rid of the CO2 gas made by cellular respiration? Respiratory System Diagram. 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