People are the lungs of the respiratory system.
There is a pair of lungs in the thoracic cavity - the left lung and right lung. left lung is slightly smaller (because of the heart, which is slightly to the left of the body) and has two lobes and the right lung is larger with three lobes. They are spongy and flexible bodies, which are wide at the base and the upper cone. They consist of a bubble, and alveolitis. Many groups of bubbles and open to the common area. From this point seems to alveolar ducts, which form a branch. Connect them to the junction of the airways. The blood vessels of the lungs, which are branches of the pulmonary artery and veins.
Each lung is surrounded by two membranes called the outer and inner membrane of the pleura. Membranes include space called the pleural cavity which contains the liquid. The lungs are able to expand and contract, because they are flexible members. Lubrication free movement by the fluid in the pleural cavity.
Thoracic consists of 12 pairs of ribs and intercostal muscles, which are attached to the ribs. Thick membranous structure is lower in the lungs and diaphragm separates the chest from the abdomen.
In addition to the lungs, is related to many organs and structures, which together form the respiratory system. The respiratory system is closely linked with the cardiovascular system, such as gas transport takes place through the blood.
Respiratory system starts with the nose, which included the nasal cavity. Opening to the outside of the nasal cavity through openings called nostrils. nasal cavity is divided into two parts by the septal cartilage and surrounded by fine hairs, filter dust particles from the air. The nasal cavity is separated from the mouth of hard and soft palate, which form the floor. Opens in a region called the throat.
Gorge is common to both food and air. This allows air to flow more air and allows each application when the nose is blocked. Throat still strong.
Glottis is narrow opening in the larynx. It is guarded by a flap of tissue called the epiglottis. A few folds of elastic connective tissue are integrated in the rear end of the glottis. They are called the vocal cords. Develop in the larynx.
is also called the voicebox. The stretch cords in the larynx and vibrating when air passes through them. This vibration produces different sounds.
Airway also contributes to the production of sound. Part of the road, performing the functions of the larynx or throat. It has several folds of elastic connective tissue called the vocal cords. Extends from the rear of the throat at the end of the larynx. As air passes through the larynx, the son of vibration and sound production.
coordinated movement of the lips, cheeks, tongue and jaw to produce specific sounds, which led to the floor. Language is a possibility that only people who are gifted and is one of the characteristics that put a man on top of the tree of evolution.
Larynx is held open by cartilage. Apple "Adam" is a cartilage in laryngeal view. Larynx, trachea, even as the strings.
is also called the trachea. Trachea is maintained by cartilaginous rings in the shape of C. The open ends of the rings in the direction of the esophagus, also known as foodpipe. Trachea is located in front of the esophagus. Cartilage to keep the larynx and trachea from collapsing, even when there is no air in them. Trachea, then branch into two main branches called bronchi.
Each bronchus is also supported by cartilaginous rings. Bronchi then ramify into several branches. Cartilage branching gradually lost as they become closer. End of branching, as it is called vesicular tubular son purposes.
Each duct opens the bag to the alveoli. air sac is expanded in the region in which a group of bubbles or bubble open.
Each cell is similar to the structure of cushion covered with a single layer of epithelial cells. Linked to the outside through a network of capillaries. All alveolitis one side are closed by a membrane called the pleura is the membrane of the lung.
pulmonary artery of the heart contains impure blood enters the lungs and branches in the minutes of the capillaries surrounding the follicles. These then connect to the pulmonary vein that carries blood to the heart purified.
Way, inhalation of air
The composition of the air we breathe in are:
Nitrogen - 78%
Oxygen - 21%
Carbon dioxide - 0.03 - 0.04%
Hydrogen - traces
Noble gases - traces
In this way air naturally contains more oxygen than carbon dioxide. This oxygen-rich air will be taken through the nostrils. The nasal cavity is filtered by the hair. Cavity also has a diet rich in blood vessels that prevent the warm air. This air then enters the pharynx, larynx, and then, and then to the trachea.
Trachea and bronchi are covered with ciliated epithelial cells and secretory cells (goblet cells). The secretory cells secrete mucus which moistens the air passes through the digestive Repiratory trap any small particles of dust and bacteria, which were omitted in the hair of the nasal cavity. Cilia beat to move upward so that the particles of mucus is sent to the base of the mouth, where it can be swallowed or spit.
Air then enters the bronchial tubes and bubbles. Bubbles form on the surface of human lung.
Follicular capillaries lining the blood is impure, which has a low oxygen concentration. Thus, the oxygen from the air diffuses easily into the blood by a thin alveolar wall barrier. Similarly, because the concentration of carbon dioxide is very high in the blood, the gas can easily dispersed in the alveolar space. Therefore, the air has a relatively higher concentration of carbon dioxide than the air entering her letter to the lungs.