BIOL 129 Lecture Notes - Lecture 13: Elastic Fiber, Nasal Cavity, Serous Membrane

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16 Oct 2016
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Facilitating the direction of odors in the nasal cavity. Trachea: flexible tube that carries air from larynx to lungs. Rings of cartilage are connected by smooth muscle: contraction narrows the airway and expansion opens the airway. Epithelial cells (inner most lining of trachea) have cilia: slender extensions that sweep mucous and debris upward and out of the trachea. Trachea splits into two primary bronchi (singular: bronchus) Within the lungs these further split into secondary bronchi and smaller tertiary bronchi. Left lung- 2 lobes (heart is in this area taking up some of the space) Medial surfaces contain hilum: area of entry and exit to lung. Pulmonary arteries: transport deoxygenated blood to the lungs. Pulmonary veins: transport oxygen-rich blood from the lungs. Arch of the aorta leaves a grooved impression. Pulmonary embolism: occurs when a blood clot gets stuck in one of the pulmonary arteries (usually from somewhere else in the body and travels to the lungs)

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