2.1_ General Anatomy of the Respiratory System_ Essential Human Anatomy and Physiology I with Lab- K

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8/20/20202.1: General Anatomy of the Respiratory System: Essential Human Anatomy and Physiology I with Lab- Keck2/15enter each lung(Figure 2.2). Healthy lung tissue has a very light texture and ispeachy/pink in color.Figure 2.1 Anterior view: Gross anatomy of lungs.The right lung has three lobes(superior, middle, inferior) while the left lung has two lobes (superior, inferior). Theright and left lung both have oblique fissures separating the lobes. The right lungalso has a horizontal fissure separating the superior and middle lobes.
8/20/20202.1: General Anatomy of the Respiratory System: Essential Human Anatomy and Physiology I with Lab- KeckFigure 2.2 View of Hilum (root) of right lung.The hilum (highlighted in blue) iswhere the pulmonary vessels and bronchi enter through each lung.Thepleuraeare membranes that cover the surface of the lung and the cavitysurrounding the lungs. Thevisceral pleuradirectly covers the lungs, and theparietal pleuracovers the surfaces surrounding the lungs: the rib cage, diaphragm,and mediastinum. The space that is formed between the pleurae is called thepleural spaceor cavity. Normally, this space is empty except for a scant amount offluid. However, in the diseased state, this cavity can fill with air or fluids. The pleuraereduce friction and provide a negative pressure environment needed for lunginflation. The pleurae also help to pull the lungs open with the chest wall duringinhalation.The anatomical organization of the respiratory system allows the respiratory system
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8/20/20202.1: General Anatomy of the Respiratory System: Essential Human Anatomy and Physiology I with Lab- Keck2.1: General Anatomy of theRespiratory System
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8/20/20202.1: General Anatomy of the Respiratory System: Essential Human Anatomy and Physiology I with Lab- Keck4/15of gases. This third step is also calledrespiration. The respiratory system also has

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