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The following other wikis use this file: Usage on bg.wikipedia.org Дихателна система; Usage on el.wikipedia.org Αναπνευστικό σύστημα
Português: Diagrama esquemático do sistema respiratório humano, mostrando os pulmões, os alvéolos, os músculos responsáveis pelo movimento do ar para dentro e para fora do corpo. Svenska : Schematisk bild över andningssystemet hos en människa .
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In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract.The tract is divided into an upper and a lower respiratory tract.The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds.
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The inferior pharyngeal constrictor muscle is a skeletal muscle of the neck. It is the thickest of the three outer pharyngeal muscles. It arises from the sides of the cricoid cartilage and the thyroid cartilage. It is supplied by the vagus nerve (CN X). It is active during swallowing, and partially during breathing and speech.