right • left • lingula • apex • base • root • cardiac notch • cardiac impression • hilum • borders (anterior, posterior, inferior) • surfaces (costal, mediastinal, diaphragmatic) • fissures (oblique, horizontal) List of bones of the human skeleton Human anatomy is primarily the scientific study of the morphology of the adult human body. ... The Respiratory System Among four-legged animals, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. ... The visible part of the human nose is the protruding part of the face that bears the nostrils. ... The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face. ... The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial, or superior, to the esophagus, larynx, and trachea. ... The larynx (plural larynges), colloquially known as the voicebox, is an organ in the neck of mammals involved in protection of the trachea and sound production. ... The human lungs are the human organs of respiration. ... A bronchus (plural bronchi, adjective bronchial) is a caliber of airway in the respiratory tract that conducts air into the lungs. ... The alveoli (singular:alveolus), tiny hollow sacs which are continuous with the airways, are the sites of gas exchange with the blood. ... The conducting zone of the respiratory system is made up of the trachea, bronchi, bronchioles, and terminal bronchioles. ... The respiratory zone is the site of O2 and CO2 exchange with the blood. ... List of bones of the human skeleton Human anatomy is primarily the scientific study of the morphology of the adult human body. ... The human torso Torso is an anatomical term for the greater part of the human body without the head and limbs. ... The Respiratory System Among four-legged animals, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. ... The human lungs are the human organs of respiration. ... The human lungs are the human organs of respiration. ... The right lung is divided into three lobes, superior, middle, and inferior, by two interlobular fissures: // One of these, the oblique fissure, separates the inferior from the middle and superior lobes, and corresponds closely with the fissure in the left lung. ... The left lung is divided into two lobes, an upper and a lower, by the oblique fissure, which extends from the costal to the mediastinal surface of the lung both above and below the hilus. ... According to most sources, there is no middle lobe in the left lung as there is in the right lung. ... The apex of the lung is rounded, and extends into the root of the neck, reaching from 2. ... The base of the lung is broad, concave, and rests upon the convex surface of the diaphragm, which separates the right lung from the right lobe of the liver, and the left lung from the left lobe of the liver, the stomach, and the spleen. ... A little above the middle of the mediastinal surface of each lung, and nearer its posterior than its anterior border, is its root, by which the lung is connected to the heart and the trachea. ... The anterior border of the right lung is almost vertical, and projects into the costomediastinal sinus; that of the left lung presents, below, an angular notch, the cardiac notch, in which the pericardium is exposed. ... The mediastinal surface of the lung presents a deep concavity, the cardiac impression, which accommodates the pericardium; this is larger and deeper on the left lung than on the right lung, on account of the heart projecting farther to the left than to the right side of the median plane. ... Above and behind the cardiac impression is a triangular depression named the hilum, where the structures which form the root of the lung enter and leave the viscus. ... The anterior border of the lung is thin and sharp, and overlaps the front of the pericardium. ... The posterior border of the lung is broad and rounded, and is received into the deep concavity on either side of the vertebral column. ... The inferior border of the lung is thin and sharp where it separates the base from the costal surface and extends into the phrenicocostal sinus; medially where it divides the base from the mediastinal surface it is blunt and rounded. ... The costal surface of the lung (external or thoracic surface) is smooth, convex, of considerable extent, and corresponds to the form of the cavity of the chest, being deeper behind than in front. ... The mediastinal surface of the lung is in contact with the mediastinal pleura. ... The diaphragmatic surface of lung is the portion of the lung which borders on the thoracic diaphragm. ... In the lung, the oblique fissure (or major fissure) separates the inferior lobe of either lung from the remainder of the lung. ... The horizontal fissure of right lung (or transverse fissure) is a fissure separating the superior lobe from the inferior lobe. ...

trachea (tracheal rings, carina) • bronchi • main bronchus (right, left) • lobar/secondary bronchi (eparterial bronchus) • segmental/tertiary bronchi (bronchopulmonary segment) • bronchiole • terminal bronchiole The conducting zone of the respiratory system is made up of the trachea, bronchi, bronchioles, and terminal bronchioles. ... The cartilages of the trachea (or tracheal rings) vary from sixteen to twenty in number: each forms an imperfect ring, which occupies the anterior two-thirds or so of the circumference of the trachea, being deficient behind, where the tube is completed by fibrous tissue and unstriped muscular fibers. ... In anatomy, the carina is a cartilaginous ridge in the sagittal plane of the trachea where it splits into the two primary bronchi. ... A bronchus (plural bronchi, adjective bronchial) is a caliber of airway in the respiratory tract that conducts air into the lungs. ... The Respiratory system is a very important part of the human body. ... The left main bronchus (or left primary bronchus, or left principal bronchus) is smaller in caliber but longer than the right, being nearly 5 cm long. ... Secondary bronchi (also known as lobar bronchi) arise from the primary bronchi, with each one serving as the airway to a specific lobe of the lung. ... The right bronchus gives off, about 2. ... The tertiary bronchi (also known as the segmental bronchi) arise from the secondary bronchi. ... Each of the tertiary bronchi serves a specific bronchopulmonary segment. ... The bronchioles are the first airway branches that no longer contain cartilage. ... A terminal bronchiole is a bronchiole at the end of the conducting zone. ...

respiratory bronchiole • alveolar duct • alveolus • alveolar-capillary barrier The respiratory zone is the site of O2 and CO2 exchange with the blood. ... The bronchioles are the first airway branches that no longer contain cartilage. ... Alveolar ducts are the tiny end tubules of the branching airways that fill the lungs. ... Detailed drawing of the alveoli from Grays Anatomy, 1918 - Schematic longitudinal section of a primary lobule of the lung (anatomical unit); r. ... This article or section does not cite its references or sources. ...

parietal pleura (cervical, costal, mediastinal, diaphragmatic) • visceral pleura • pulmonary ligament • recesses (costomediastinal, costodiaphragmatic) • pleural cavity The lungs are surrounded by two membranes, the pleurae. ... The portion of the pleura external to the pulmonary pleura lines the inner surface of the chest wall, covers the diaphragm, and is reflected over the structures occupying the middle of the thorax; this portion is termed the parietal pleura. ... Different portions of the parietal pleura have received special names which indicate their position: thus, that which rises into the neck, over the summit of the lung, is the cupula of the pleura (cervical pleura). ... Different portions of the parietal pleura have received special names which indicate their position: thus, that portion which lines the inner surfaces of the ribs and Intercostales is the costal pleura. ... Different portions of the parietal pleura have received special names which indicate their position: thus, that portion which lines the inner surfaces of the ribs and Intercostales is the costal pleura; that clothing the convex surface of the diaphragm is the diaphragmatic pleura; that which rises into the neck, over... Different portions of the parietal pleura have received special names which indicate their position: that clothing the convex surface of the diaphragm is the diaphragmatic pleura. ... Visceral fluid is the special fluid found within the lungs. ... The root of the lung is covered in front, above, and behind by pleura, and that at its lower border the investing layers come into contact. ... The costomediastinal recess is a potential space at the border of the mediastinal pleura and the costal pleura. ... In the pleural cavity, the costodiaphragmatic recess is a potential space at the posteriormost tips of the cavity, located at the junction of the costal pleura and diaphragmatic pleura. ... The lungs are surrounded by two membranes, the pleurae. ...