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Title: What structures/elements are present in the nasal breathing passageway that are Post by: love1995 on Dec 21, 2014 “During inspiration, air passes through nose/mouth, pharynx (throat) and larynx. These constitute the upper airways. Airways beyond the larynx are divided into 2 zones:
(1) The conducting zone where there is no gas exchange. This consists of the tracheal tube, which branches into two bronchi, one of which enters each lung and makes further branching. Walls of trachea and bronchi contain cartilage for support. The first branches without cartilage are called terminal bronchioles. (2) The respiratory zone where gas exchange occurs. Consists of respiratory bronchioles with alveoli attached to them. Epithelial surfaces of airways up to respiratory bronchioles have cells that secrete mucus to trap particulate matter in air, which is then moved by cilia present on these cells and swallowed. Macrophages, which engulf pathogens, are also present.“ QUESTION: What structures/elements are present in the nasal breathing passageway that are absent in the oral pathway? And, how do these function? Title: Re: What structures/elements are present in the nasal breathing passageway that are Post by: rsb on Dec 21, 2014 What structures/elements are present in the nasal breathing passageway that are absent in the oral pathway? And, how do these function? Both air ends up in the lungs, though in nasal breathing, the air is filtering by the hairs found within the nose. Title: Re: What structures/elements are present in the nasal breathing passageway that are Post by: wizarddim on Dec 21, 2014 Hi, I have attached two resources that might help you! :-:)
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