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Pulmonary Anatomy
Lungs & Mechanics
| Question | Answer |
|---|---|
| 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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