lungs

Question 1

Pleural Sacs

Answer 1

• encloses each lung

- has two pleurae membranes

Question 2

Visceral pleura

Answer 2

-covers the lungs and its adherent to all it surfaces

Question 3

Parietal pleura

Answer 3

-lines the pulmonary cavities, adhering to the thoracic wall, the mediastinum and the diaphrahm

Question 4

Pleural cavity

Answer 4

• potential space between the viseral and parietal pleura

- where pleural fuild is

Question 5

The four parts of parietal pleura

Answer 5

• costal
• mediastinal
• diaphragmatic
• cervical

Innervated by posterior and anterior intercostals

Question 6

Costal Part of Parietal pleura

Answer 6

-covers the internal surfaces of the thoracic wall (its seperated from the wall by endothoracic fascia)

Question 7

Mediastinal part of Parietal pleura

Answer 7

covers the lateral aspects of the mediastinum

Question 8

Diaphragmatic part of Parietal pleura

Answer 8

covers the surperior surface of the diaphragm o each side of the mediastinum

Question 9

cervical pleura

Answer 9

• extends through the superior thoracic aperture

- forms a cup-shaped dome over the apex of the lung

Question 10

three surfaces of the lungs

Answer 10

• costal surface:
• mediastinal surface:
• diaphragmatic surface

Question 11

three borders of the lungs

Answer 11

anterior border
inferior border
posterior border

Question 12

the apex of the lungs

Answer 12

• blunt superior end of lung, above the 1st rib into the root of the neck
• covered by cervical pleura

Question 13

horizontal and oblique fissures

Answer 13

-divided the lungs into lobes

Question 14

Right lung

Answer 14

• has three lobes

- larger and heavier

Question 15

Left lung

Answer 15

has two lobes and cardic notch

Question 16

hilum of the lung

Answer 16

-area on the medial surface of each lung at whcih the structures forming the root enter and leave the lung

Question 17

What innervates the lungs?

Answer 17

Vagus nerve

-provides motor to the smooth muscles of the bronchial tree

Question 18

What is the root of the lung?

Answer 18

structures entering and emerging from the lung

Question 19

What artery supplies the lungs

Answer 19

-Brachial artery

(Right one rises from superior posterior intercostal artery, left one rises from thoracic artery

Question 20

Vein drainage of the lungs

Answer 20

The right brachial vein drain into the Azygos vein, the left brachial vein drains into accessory hemi-azygo vein

Question 21

Flow of air

Answer 21

• Trachea
• Two main Bronchi
• Lobar Bronchi
• Segmental Bronchi
• Terminal Bronchi
• Alveolar Ducts
• Alveolar Sacs

Question 22

What is respiration?

Answer 22

exchange of oxygen and carbon dixoide

Question 23

what is ventilation?

Answer 23

movement of gas or air into and out of the lungs