Chapter 14 Respiratory System

To provide body with essential oxygen and dispose of carbon dioxide

1. Breathing (ventilating): movement of air into and out of lungs2. External respiration: exchange of oxygen and carbon dioxide btwn lungs and the blood3. Gas transport: transportation of oxygen from the lungs to the cells and of CO2 from the cells to the lungs.4. Internal Respiration: exchange of oxygen and CO2 btwn the blood and the cells

1. the nose: which cleans, warms and moistens the incoming air and provides sense of smell2. the sinuses: lighten the head and adjust air quality3. the pharynx: space behind the nose and mouth, provides a passageway for food and air

1. The Larynx: an adjustable entrance tot he respiratory system that controls the position of the epiglottis and is the source of the voice.2. The Trachea: the tube that conducts air btwn the environment and lungs.3. Bronchial Tree: the trachea divides into the bronchial tree and conducts the air to each lung4.The Alveoli: which are the functional units of the respiratory system. minute sacs are where the O2 diffuses from the air into the blood & CO2 produced by the cells diffuse from the blood int o the alveolar air to be exhaled

Inflammation of the mucous membrane which lines the nasal cavity

Nasal septum

Superior, middle and inferior nasal conchae.

Sinusitis

The region extending from the nasal cavities to the larynx

Vital capacity- which is the maximum amount of air that can be moved into and out of the lungs during forceful breathing

By gas transport, the blood carries oxygen to the cells and CO2 away from the cells

Without oxygen we would die in a few minutes. our cells need energy, and oxygen plays an essential role in extracting that energy from food molecules.

The nose and air tubules helps clear particles from the air that moves through its passage.

The alveoli

Pharynx