Respiratory and Digestive Systems

Respiratory and Digestive Systems - Respiratory System...

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Respiratory System
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Entrance into the Respiratory System Nasal Cavity: Primary Site of air entry Oral Cavity: Secondary Site of air entry
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Structure of the Nose Figure 22.2b
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Nasal Cavity Figure 22.3b
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Pharynx Nasopharynx Lined by pseudostratified ciliated columnar Closed off during swallowing to prevent food from moving into the nasopharynx and nasal cavity Contains pharyngeal tonsils and the entrance into the pharyngotympanic tube (auditory tube) Oropharynx Lined by stratified squamous because it is shared by respiratory and digestive system Contains the palatine and lingual tonsils Laryngopharynx
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Framework of the Larynx Figure 22.4a, b
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Trachea Figure 22.6a
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Bronchi Bronchi subdivide into secondary bronchi, each supplying a lobe of the lungs Secondary bronchi branch into tertiary bronchi (approximately 10 on each side) Air passages undergo 23 orders of branching in the lungs
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Cartilage Bronchi LUMEN
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Bronchioles When respiratory branches reach approximately 1 mm in diameter they are called bronchioles Consist of cuboidal epithelium Have a complete layer of circular smooth muscle Lack cartilage support Lack mucus-producing cells
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Respiratory Zone Figure 22.8a
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Respiratory Zone Figure 22.8b
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Respiratory Membrane Figure 22.9b
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Respiratory Membrane Figure 22.9.c, d
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LUNGS Right Side of the body: Right Superior Lobe Right Middle Lobe Right Inferior Lobe Lobes separated by the Horizontal and Oblique fissures Left Side of the body Left Superior Lobe Left Inferior Lobe Lobes separated by the Oblique Fissure Cardiac notch (impression): a cavity that accommodates the heart (left side of body)
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Oblique Fissures Horizontal Fissure
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Lung Coverings (Pleural  Membranes) Parietal pleura Covers the thoracic wall (cavity wall) and superior diaphragm Part of the pleura continues around heart and between lungs Visceral pleura Located on the external surface of each lung Divides the thoracic cavity into three chambers The central mediastinum Two compartments for each of the lungs
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Diaphragm Skeletal Muscle located inferior to heart and lungs Primary muscle used for inspiration of air (inhalation)
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Digestive System
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This note was uploaded on 04/15/2008 for the course BIOL 310 taught by Professor Kay-nishiyama during the Fall '07 term at CSU Northridge.

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Respiratory and Digestive Systems - Respiratory System...

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