Respiratory System

Respiratory System Organization: Upper respiratory tract lower respiratory tract Function: Conducting: transports air Respiratory: exchanges gas

Respiratory System Functions Gas exchange Gas conditioning (warming, humidifying and cleaning) Sound production Olfaction Defense

Upper Respiratory Tract Composed of nose nasal cavity paranasal sinuses pharynx (throat)

True or False The nasal bone contains a paranasal sinus 17 17

Text P. 749: Know these structures as well for Lab 18 18

Your Pharynx is also called your ____________________ 19 19

Lower Respiratory Tract Conducting airways Nose, nasal cavity Pharynx larynx trachea, bronchi, bronchioles Respiratory portion respiratory bronchioles, alveolar ducts, alveoli

The Epiglottis is a. bone b. Dense fibrous connective tissue c The Epiglottis is a. bone b. Dense fibrous connective tissue c. Cartilage d. Smooth muscle True or false: The Epiglottis is a structure of the larynx 28 28

Text Page 753 30

The posterior wall of the trachea is bound by the __________ ___________________ True or false: The Larynx is inferior the trachea 32

True or False” The Pulmonary artery returns blood to the Left Atrium 34

Gross Anatomy of the Lungs Each lung has a conical shape. Its wide, concave base rests upon the muscular diaphragm. Its relatively blunt superior region, called the apex or (cupola), projects superiorly to a point that is slightly superior and posterior to the clavicle. Both lungs are bordered by the thoracic wall anteriorly, laterally, and posteriorly, and supported by the rib cage. Toward the midline, the lungs are separated from each other by the mediastinum.

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Pleura and negative pressure Pneumothorax

Hemo-thorax

Inhalation a. Increases b. Decreases the size of the thoracic cavity Exhalation , the Diaphragm moves a. Up b. down 43

Regulation of breathing Lower centers spinal cord (phrenic nerve nuclei and anterior horn cells to intercostal muscles) Upper centers medulla pons