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Pulmonary Anatomy

Lungs & Mechanics

QuestionAnswer
What are the functions of the Pleurae? Lubricate and protect Lungs from Friction
What is the composition of the Pleurae? Serous Membrane
What comprises the Pleurae? 1. Visceral layer; 2. Parietal layer
Why is the LEFT Lung smaller than the RIGHT? to make room for the HEART
How many Lobes are in the RIGHT Lung? 3 = Superior, Middle, Inferior
How many Lobes are in the LEFT Lung? 2 = Superior, Inferior
What causes Inspiration (Inhalation)? CONTRACTION of Diaphragm --> Thoracic EXPANSION --> LOWERED Intrathoracic pressure --> Atmospheric Air drawn IN
What are the Synergistic Muscles involved in Inspiration? EXTERNAL Intercostals, Sternocleidomastoids
What is the function of the External Intercostal muscles during Inspiration? RAISE Ribs
What is the function of the Sternocleidomastoid muscles during Inspiration? RAISE Clavicles
When are Synergistic Muscles employed in Respiration? for DEEP Inhale or FORCEFUL Exhale
During contraction the Diaphragm is in what position? Lowered
When relaxed the Diaphragm is in what position? Raised
What causes Expiration (Exhalation)? Thoracic SHINKAGE --> Intrathoracic pressure RAISED --> Air forced OUT through upper Airways
What are the Synergistic muscles involved in Expiration? INTERNAL Intercostals, Abdominal group
What function do the INTERNAL Intercostal Muscles serve during Expiration? DEPRESS Ribs
What function do the Abdominal group muscles serve during Expiration? ELEVATE Liver against the Diaphragm
Created by: kristel387
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