Respiratory System.

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Presentation transcript:

Respiratory System

Organs of the Respiratory System Nose (external nares) Nasal cavity Pharynx Larynx Trachea Bronchi (and their smaller branches) Lungs (alveoli Muscles ? (diaphragm and intercostals)

Nose Airway Moistens and warms air Filters and cleans inspired air Resonating chamber for speech Houses olfactory receptors Septum divides into 2 nares

Pharynx (throat) Air tube Naso, oro, laryngopharynx Hyaline cartilage holds it open Skeletal muscle

Larynx Voice box (vocal cords) Open airway Switching mechanism to rout food and air to their proper channels Thyroid cartilages (Adam’s apple)

Trachea (windpipe) Epiglottis: cartilage flap Glottis: opening to trachea

Bronchi Branching air tubes to the lungs Bronchioles: tiniest

Bronchioles

Alveoli: Air sacs for gas exchange

Lungs Paired Pleura: double layered serosa Alveoli: microscopic sacs for gas exchange

Respiratory Physiology 2 phases 1. inspiration: air flows into lungs 2. expiration: air flows out of lungs Intrapulmonary/intrapleural pressure keeps alveoli open

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