Trachea – Conducting Zone (Nursing)

by Jasmine Clark

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    00:01 So the next structure, in are lower respiratory tract that is inferior to the larynx is going to be the trachea.

    00:10 We also refer to this as the windpipe.

    00:13 This is going to extend from the larynx into the mediastinum where then is going to divide into two main bronchi.

    00:21 It is about 4 inches long, and about 3/4 of an inch in diameter, and it is very flexible.

    00:29 This flexibility is due to the rings of cartilage known as the tracheal cartilages.

    00:37 The walls of the trachea are composed of three main layers, you have the mucosal layer, which includes the ciliated pseudostratified epithelia with goblet cells.

    00:50 These goblet cells are important for mucus production.

    00:54 And this mucus is there to trap particles and dust.

    00:58 The cilia, that is a part of the epithelium are then able to sweep these trap particles and dust away from the lower respiratory tract.

    01:08 The middle layer of the trachea is the submucosa.

    01:12 This is going to contain connective tissue with also semorosero mucous glands.

    01:18 This is also supported by the cartilage rings and prevent the collapse of the trachea.

    01:26 The outermost layer is going to be composed of connective tissue and is referred to as the adventitia.

    01:36 At the posterior portion of the trachea.

    01:39 We have a group of smooth muscle fibers known as the trachealis muscles.

    01:46 These muscles are important for contraction during coughing in order to expel mucus.

    01:53 When they contract they constrict the trachea and cause air to be forced up into the airway.

    02:01 At the very bottom of the trachea or the most inferior portion of the trachea.

    02:07 We have a structure known as the carina.

    02:11 It includes the last tracheal cartilage and an expanded and found at the point where the trachea will then branch into the two main bronchi.

    02:21 This area of the trachea is highly sensitive and if, particles or foreign objects are to come in contact with the mucosa and the carina, usually violent coughing will commence.

    About the Lecture

    The lecture Trachea – Conducting Zone (Nursing) by Jasmine Clark is from the course Respiratory System – Physiology (Nursing).

    Included Quiz Questions

    1. 2
    2. 1
    3. 3
    4. 4
    1. Larynx and mediastinum
    2. Pharynx and mediastinum
    3. Pharynx and glottis
    4. Larynx and glottis
    1. Mucosa
    2. Submucosa
    3. Adventitia
    4. Endocardium
    5. Alveoli
    1. Carina
    2. Adventitia
    3. Glottis
    4. Epithelium

    Author of lecture Trachea – Conducting Zone (Nursing)

     Jasmine Clark

    Jasmine Clark

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