PBL 7 Flashcards

1
Q

What are the lungs divided into lobes by?

A

transverse and oblique fissures

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2
Q

How many lobes are in the right lung?

A

3

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3
Q

How many lobes are in the left lung?

A

2

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4
Q

What happens at the hilum?

A

The vessels, nerves and lymphatics enter the lungs`

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5
Q

Where do the vessels nerves and lymphatics enter the lungs?

A

The lung root or hilum

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6
Q

What are the lobes divided into?

A

Wedge shaped bronchopulmonary segments

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7
Q

Where are the apices of the bronchopulmonary segments?

A

The hilum

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8
Q

Where are the bases of the bronchopulmonary segments?

A

Lung surface

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9
Q

What are the broncopulmonary segments supplied by?

A

Its own segmental bronchus, artery and vein

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10
Q

What is the apex?

A

The most superior tip of each lung. It protrudes above the clavicle

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11
Q

What is the base?

A

The inferior concave surface that rests on the diaphragm

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12
Q

What is the hilum?

A

The triangular region on the medial surface of the lung

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13
Q

What are fissures?

A

Narrow depressions that divide the left and right lungs into their lobes

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14
Q

What is the cardiac impression?

A

A concavity situated on the anteroinferior and medial surface of each lung, in which the heart rests

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15
Q

What are pleura?

A

The double sheet of membrane that covers the lungs. Each lung has its own pluera

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16
Q

What are the two types of pleura called?

A

Visceral and parietal

17
Q

What is the visceral pleura?

A

The innermost layer that adheres closely to the surface of the lung and into the interlobar fissures

18
Q

What is the parietal pleura?

A

The outer layer which lines the thoracic wall, diaphragm and structures within the mediastinum

19
Q

What is the pleural cavity?

A

The space between the two membranes

20
Q

What should the pleural cavity be in a normal person?

A

It should be a potential space as both layers are in close contact

21
Q

What happens with the pleura during respiration?

A

The layers slide over each other with the help of pleural fluid.

22
Q

What are alveoli?

A

Tiny, thin walled air sacs with a rich blood supply.

23
Q

How thick are the walls of alveoli?

A

Just one cell thick, as are the capillaries that surround them allowing for easier diffusion of gases

24
Q

What are alveolar ducts?

A

Present on the distal end of respirator bronchioles. They branch into alveolar sacs.

25
Q

What are alveolar sacs?

A

The terminal dilation’s of the alveolar ducts. They connect at least two alveoli

26
Q

What does the upper respiratory tract consist of?

A

The nasal cavity, pharynx and their associated structures

27
Q

Where does air enter the respiratory tract?

A

The nasal cavity through two openings called the anterior nares (nostrils)

28
Q

What are the anterior nares supported by?

A

The alar cartilages

29
Q

What is the vestibule?

A

A small space inside the nostrils, covered in a dense network of hair,which filters out particles that maybe present in the inhaled air

30
Q

Where does the air go after the nasal cavity?

A

Backward and downwards into the pharynx

31
Q

What does the pharynx consist of?

A

Nasopharynx,oropharynx and laryngopharynx

32
Q

What is the Nasopharynx?

A

Connects the nasal cavity to the oropharynx and is seperated from the oral cavity by the soft palate

33
Q

What is the oropharynx?

A

Sits between the soft palate and the upper border of the epiglottis, and posterior to the oral cavity

34
Q

What is the layrngopharynx?

A

Lies behind the larynx and terminates at the level of the cricoid cartilage by becoming continuous with the esophagus.