Lecture notes, cheat sheets
English for doctors. Lungs (lecture notes) Directory / Lecture notes, cheat sheets Table of contents (expand) LECTURE #22 Intrapulmonary bronchi: the primary bronchi gives rise to three main branches in the right lung and two branches in the left lung, each of which supply a pulmonary lobe. These lobar bronchi repeatedly divide to give rise to bronchioles. Mucosa consists of the typical respiratory epithelium and an underlying lamina propria similar to that of the trachea. However, a layer of loosely woven smooth muscle (muscularis mucosae), which separates the lamina propria from the submucosa, is present. Submucosa consists of elastic tissue with fewer mixed glands than seen in the trachea. Anastomosing cartilage plates replace the C-shaped rings found in the trachea and extra pulmonarys of the primary portion bronchi. These plates become progressively smaller as airway diameter decreases. Bronchioles do not possess cartilage, glands, or lymphatic nodules; however, they contain the highest proportion of smooth muscle in the bronchial tree. Bronchioles branch up to 12 times to supply lobules in the lung, which are bounded by connective tis sue septa. The smallest conducting bronchioles are called terminal bronchioles. Bronchioles are lined by ciliated, simple, columnar epithelium with nonciliated bronchiolar (Clara) cells. Goblet cells are sent in large bronchioles. A smooth muscle layer interlaces the elastic fibers of the lamina propria. The musculature of the bronchi and bronchioles con tracts following stimulation by parasympathetic fibers (vagus nerve) and relaxes in response to sympathetic fibers. Terminal bronchioles consist of low-ciliated epithelium with bronchiolar cells. The costal surface is a large convex area related to the inner surface of the ribs. The mediastinal surface is a concave medial surface. The left lung has a deep cardiac impression. The mediastinal surface contains the root, or hilus, of the lung. The pulmonary ligament is a double fold of pleura hanging inferior to the root of the lung. The diaphragmatic surface (base) is related to the convex sur face of the diaphragm. It is more concave on the right due to the presence of the liver. The apex (cupola) protrudes into the root of the neck. It is crossed by the subclavian artery anteriorly. The hilus is the point of attachment for the root of the lung. It contains the bronchi, pulmonary and bronchial vessels, lymphatics, and nerves. Lobes and fissures. The right lung is divided by the oblique and horizontal fissures into three lobes: superior, middle and inferior. The left lung has only one fissure, the oblique, which divides the lung into upper and lower lobes. The lingula of the upper lobe corresponds to the middle lobe of the right lung. Bronchopulmonary segments of the lung are supplied by the segmental (tertiary) bronchus, artery, and vein. There are 10 on the right and 8 on the left. Arterial supply: Right and left pulmonary arteries arise from the pulmonary trunk. The pulmonary arteries deliver deoxygenated blood to the lungs from the right side of the heart. Bronchial arteries supply the bronchi and nonrespiratory ports of the lung. They are usually branches of the thoracic aorta. Venous drainage. There are four pulmonary veins: superior right and left and inferior right and left. Pulmonary veins carry oxygenated biblood to the left atrium of the heart. The bronchial veins drain to the azygos system. They share drainage from the bronchi with the pulmonary veins. Lymphatic drainage: Superficial drainage is to the bronchopulmonary nodes; from there, drainage is to the tracheobronchial nodes. Deep drainage is to the pulmonary nodes; from there, drainage is to the bronchopulmonary nodes. Bronchomediastinal lymph trunks drain to the right lymphatic duct and the thoracic duct. Innervation of Lungs: Anterior and posterior pulmonary plexuses are formed by vagal (parasympathetic) and sympathetic fibers. Parasympathetic stimulation has a bronchoconstrictive effect. Sympathetic stimulation has a bronchodilator effect. new words lungs - lungs intrapulmonary bronchi - intrapulmonary bronchi the primary bronchi - primary bronchi to give - to give to rise - raise lobar bronchi - lobar bronchi to divide - divide repeatedly - repeatedly loosely - freely woven - woven smooth - smooth submucosa - submucosa costal - costal surface - the surface onvex - convex apex - top to protrude - protrude superior - above right - right left - left inferior - inferior innervation - innervation Plural formation of nouns: a cat - cats a dog - dogs and car - cars a watch - watches a dress - dresses a dish - dishes a box - boxes a potato - potetos Remember the plural form of the following nouns: a goose-geese a tooth - teeth a foot - feet an ox - oxen a man - men a woman - women a child - children a mouse - mice And also: an englishyou - englishmen a frenchyou - frenchmen a german - germans There are nouns that have the same form in the plural as in the singular: a sheep-sheep a deer - deer a swine - swine Make the following nouns plural. A park, a play, a table, a plate, a fox, a room, a lady, a knife, a hair, a bus, a match, a way, a house, a family, a flag, a town, a wolf , a country, a lion, a star, a mountain, a tree, a shilling, a king, the waiter, the queen, a man, the man, a woman, the woman, an eye, a shelf, a box, the city, a boy, a goose, the watch, a mouse, a dress, a toy, the sheet, a tooth, a child, the ox, a deer, the life, a tomato. This tea-cup, this egg, that wall, that picture, this foot, that mountain, this lady, that window, this man, that match, this knife. Answer the questions. 1. What do the primary bronchi give? 2. For how many main branches in the right lung give primary bronchi rise? 3. For how many main branches in the left lung give primary bronchi rise? 4. What for lobar bronchi divide repeatedly? 5. What does mucosa consist of? 6. What is submucosa composed of? 7. What lung has a deep cardiac impression? 8. Where is the diaphragmatic surface (base) related? 9. How many pulmonary veins are there? 10. How are anterior and posterior pulmonary plexuses formed by? Make the sentences of your own using the new words (10 sentences). Find the definite and indefinite articles in the text. Author: Elena Belikova << Back: Heart >> Forward: respiratory system We recommend interesting articles Section Lecture notes, cheat sheets: ▪ pathological physiology. Crib ▪ History of political and legal doctrines. Crib See other articles Section Lecture notes, cheat sheets. Read and write useful comments on this article. Latest news of science and technology, new electronics: The existence of an entropy rule for quantum entanglement has been proven
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