Essay about Describing the Human Respiratory System

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Describe the Human Respiratory System Question 1: Complete the table below by describing the structure and function of each part of the respiratory system listed. Structure Function Nose The nasal root is the top of the nose, forming an indentation at the suture where the nasal bones meet the frontal bone. The nose filters air with hairs and mucus, and moisturises and warms the air. Pharynx The pharynx (throat) is a mucosa-lined, muscular tube with three regions nasopharynx, oropharynx, and laryngopharynx. The nasopharynx functions in respiration only; the others serve both respiratory and digestive functions. The pharynx contains tonsils, which act as part of the body's defense system. Larynx The larynx (voice…show more content…
Describe the Human Respiratory System Question 1: Complete the table below by describing the structure and function of each part of the respiratory system listed. Structure Function Nose The nasal root is the top of the nose, forming an indentation at the suture where the nasal bones meet the frontal bone. The nose filters air with hairs and mucus, and moisturises and warms the air. Pharynx The pharynx (throat) is a mucosa-lined, muscular tube with three regions nasopharynx, oropharynx, and laryngopharynx. The nasopharynx functions in respiration only; the others serve both respiratory and digestive functions. The pharynx contains tonsils, which act as part of the body's defense system. Larynx The larynx (voice box) is a cartilage structure; most prominent is the thyroid cartilage (Adam's apple). The larynx connects the pharynx with the trachea below. The laryngeal opening (glottis) is hooded by the epiglottis, which prevents entry of food or drink into respiratory passages when swallowing. The larynx contains the true vocal cords, which produce sounds used in speech. Lungs The lungs are paired organs flanking the mediastinum in the thoracic cavity. The lungs are covered with visceral pleura; the thorax wall is lined with parietal pleura. Pleural secretions decrease friction during breathing. The lungs are primarily elastic tissue, plus passageways of the respiratory tree. The smallest passageways end in clusters of alveoli. Trachea The
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