The human respiratory system consists of a pair of lungs and a series of air passages leading to the lungs. 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. PHARYNX is made up of the fibromuscular tube that consists of a ring of specialized lymphatic tissue. The parietal pleura folds back on itself at the root of the lung to become the visceral pleura. There are two other types of animal tissue—muscular and nervous. When it contracts, it becomes flattened and therefore increases the volume of the thoracic cavity. Pleura, plural pleurae, or pleuras, membrane lining the thoracic cavity (parietal pleura) and covering the lungs (visceral pleura). 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. In health the two pleurae are in contact. ; Pharynx – It is a passage behind the nasal chamber and serves as the common passageway for both air and food. Internal respiration. 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. External respiration. Oxygen and carbon dioxide must be transported to and from the lungs and tissue cells of the body via the bloodstream. The regions of the pharynx are nasopharynx, oropharynx, and laryngopharynx. Similarly, contraction of the external intercostal muscles moves the ribs upwards and outwards. When air passes through the nose, […] Gas exchange between the pulmonary blood and alveoli must take place. 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. Respiratory gas transport. The entire respiratory tract (passage) consists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. Animal tissues: The cheek cells are a type of epithelial tissue, while blood is a kind of connective tissue. Human respiratory system - Human respiratory system - The mechanics of breathing: Air moves in and out of the lungs in response to differences in pressure. This is known as internal or tissue respiration. The lungs are the main part of your respiratory system. Muscles of the Respiratory System. Air enters the nose through the nostrils. ADVERTISEMENTS: Human Respiratory System and it’s Mechanism! Respiratory System Diagram. ; Nasal chamber – which is lined with hair and mucus to filter the air and remove dust and dirt. Its main function is protection. Epithelial tissue: This tissue covers the surface of the body and lines the internal organs. 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