Trachea And Bronchi Case Study
Anatomy of the lungs. The lungs are a pair of sponge-like, elastic organs. They fill the greater part of the cavity of the chest, and consist of multiple minute, air-filled cavities (alveoli). These are connected by the branching system of bronchi and bronchioles Each of these two structures has the shape of a half cone. They are comparatively light because of their content of air (right, approximately 600 g: left, 550 g in a healthy adult) and they float freely in water unless filled with fluid (e.g., before birth) or consolidated by disease The lungs are described as having costal, mediastinal, apical and diaphragmatic surfaces. The right lung has three lobes and the left has two, with the lingula of the left upper lobe corresponding to the right middle lobe One terminal bronchiole with lung tissue forms an acinus which, together with vessels, lymphatics and nerves, forms the primary lobule. Three to five primary lobules form a secondary …show more content…
Anatomy of the chest wall.
The bony framework is bounded by the 12 thoracic vertebrae posteriorly, from which 12 sets of bony ribs articulate and curve around, connecting with the manubrium, sternum, and costal cartilage anteriorly. The central anterior chest is defined by the sternum, which consists of 3 separate bones of the manubrium, sternal body, and xiphoid process The first 7 ribs, called true ribs, are attached to the sternum and manubrium directly. The 8th-10th ribs are attached via the costal cartilages, while the 11th and 12th ribs remain unattached anteriorly. The 8th-10th ribs are known as false ribs because they lack direct attachment to the sternum, and the 11th-12th are referred to as floating ribs. Posteriorly, the ribs articulate with costal facets of 2 adjacent vertebrae. An articular capsule surrounds the head of each rib, which is secured by attachments of the radiate ligament. Each rib also articulates with the transverse process of its adjacent vertebrae through a costotransverse joint. The bony ribs then curve around anteriorly, where the next major junction is the costochondral