Anatomy 1 Lecture 19 - Pleura and Lungs
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What are the two types of pleura involved with the lungs?
What do we call the area where the join up?
- Visceral (lining the lungs) and Parietal (lining the walls of the thoracic cavity)
- The root of the lung.
Parietal pleura has several parts, what are they and what do they do?
- Costal pleura -lining the thoracic walls
- Diaphragmatic pleura - lining of the diaphragm
- Mediastinal pleura - lining of the mediastinum
What is it about the two pleural cavities that allows them to each have their owen closed potential spaces? What feature enables the movement of the lung within the pleural cavities?
Theyare two seperate cavities. They are filled with interstitial fluid which reduces friction between the parietal and visceral pleura.
How many lobes does the right lung have?
What seperates these lobes?
- Three lobes: Superior, Middle, and Inferior.
- The oblique and horizontal fissures.
How many loves on the left lung? What are they called?
- 2- Superior and Inferior
Where do the lungs receive their air from?
- The trachea gives of a primary bronchus to each lung.
- Each primary bronchus divides into lobar bronchi which supplies the lobes of the lung
- Each lobar bronchus divides into tertiary segmental bronchi which supply specific bronchopulmonary segments.
What is the function of the pulmonary arteries?
Where do the pulmonary arteries lay?
What is interested about this blood supply to the lungs?
- They provide deoxygenated blood to the lungs to be aerated with O2
- They are posterior to the bronchi but run with the bronchi.
- There is no anastomoses between the bronchopulmonary segments. Therefor, removal of one lobe won't affect the other lobes.
What is the function of the pulmonary veins?
Where do the superior and inferior pulmonary veins for?
Where do the superior and inferior pulmonary veins receive blood from?
- They return the oxygenated blood back to the heart.
- At the hilus of each lung
- Superior: tributes from the superior and middle lobes of the right lung, and superior and lingula lobes of the left lung
- Inferior: tributes from the lower lobes of right and left lung
Where is the root of the lung?
What it is?
- The attachment point of the lung
- It connects the lung to the heart and trachea and is surrounded by the reflection of the parietal to visceral pleura.
- Provides the highway for the main bronchus, pulmonary vessels, bronchial vessels, lymph vessels and nerves.
Explain the lymph drainage in the lungs.
- The superficial lymphatic drains to the surface and runs along the viceral pleura to the hilum
- Deep lymphatic drainage follow the bronchi and collects at the hilum
- At the hilum, all the lymphatic drainage is filtered bt the tracheobronchial lymph nodes.
What is hte parietal pleura called superiorly? Inferiorly?
- The cupula of the pleura, this is where pleura extends through the thoracic inlet.
- Inferiorly it is relater three ways: anterior - 7th costal cartilage, mid-axillary - 10th costal cartilage, posteriorly - 12th vertebral level
What is the pleural recess?
- Costodiphragmatic recess - seperation of the parietal pleura from the vesceral pleura where the costal and diaphragmatic pleura meet.
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