Unit 3, Lesson 6: The Respiratory System

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Presentation transcript:

Unit 3, Lesson 6: The Respiratory System

Purpose of the Respiratory System Provide oxygen to the tissues Remove carbon dioxide from the body Temperature control, elimination of waste and voice production Clean air before it enters the inner body

Components of the Respiratory System Nostrils: external openings Nasal Cavity: connected to mouth by a hard and soft palate Pharynx: Common passageway for food and air, but not at the same time. Epiglottis: a valve-like structure that shuts when swallowing food. Larynx: voice box for animal, controls breathing, keeps objects out of lungs

Components of the Respiratory System, Con’t. Trachea: wind pipe, consists of cartilage rings, similar to vacuum cleaner hose Bronchi: Two tubes from trachea, each side enters a lung Bronchioles: Small tubes from the bronchi Alveoli: Smallest bronchioles, exhausts carbon dioxide Diaphragm: sheet of muscle located beneath the lungs that separates the chest cavity from the abdominal cavity.

Components of the Respiratory System, Con’t. Lungs: Two, elastic, spongy material that expand when filled with air Cone shaped and divided into lobes Lungs will always float in water Primary purpose of the lungs is gas exchange

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