Lecture 20: Lungs and Bronchial Tree

Question 1

Parietal pleura lines the

Answer 1

Thoracic cavity

Question 2

Costomediastinal recess allow for

Answer 2

Expansion of lungs during inspiration

Question 3

Pleura is displaced on left side because of

Answer 3

Displacement by the heart

Question 4

Right pleural line levels

Answer 4

Leaves sternum at 7th costal cartilage
8th costal cartilage- midclavicular line
10th rib- axillary line
11th rib- scapular line

Question 5

Left pleural line levels

Answer 5

Leaves sternum at IC space 5
8 cc- midclavicular
10rib- axillary line
11rib- scapular line

Question 6

Right lung projections

Answer 6

Leaves sternum at 6th costal cartilage
6rib- midclavicular line
8rib- axillary line
10rib- scapular line
(left lung is same except cardiac notch begins at 4th costal cartilage)

Question 7

Oblique fissure

Answer 7

Separates superior/inferior lobes of left and right lung

Question 8

Horizontal fissure

Answer 8

Separates superior/middle lobes of right lung only, left lung has no horizontal fissure

Question 9

Lung lobes/lobules on each side and what supplies them

Answer 9

3 lobes on right, 2 lobes on left- supplied by secondary bronchi
10 lobules on right, 8 on left- supplied by tertiary bronchi

Question 10

Right lung lobes include

Answer 10

Superior
Middle
Inferior

Question 11

Left lung lobes include

Answer 11

Superior

Inferior

Question 12

Trachea bifurcates into primary bronchi at the

Answer 12

Sternal angle

Question 13

Carina

Answer 13

Located at inferior end of trachea where it branches into two primary bronchi
Produces intense cough reflex

Question 14

Aspirated objects more commonly follow

Answer 14

Right bronchus

Question 15

Angle between primary bronchi is

Answer 15

62 degrees

Question 16

Secondary bronchi supply

Answer 16

Lobes

Question 17

Tertiary bronchi supply

Answer 17

Lobules (bronchopulmonary segments)

Question 18

Respiratory bronchi

Answer 18

First site where gas exchange can occur

Question 19

Pulmonary arteries arise from and carry

Answer 19

Pulmonary trunk

Carry deoxygenated blood

Question 20

Left bronchial arteries from

Answer 20

Thoracic aorta

Question 21

Right bronchial arteries from

Answer 21

Usually from first aortic intercostal artery

Question 22

Right bronchial vein drains to

Answer 22

Azygos vein

Question 23

Left bronchial vein drains to

Answer 23

Hemiazygos vein or left superior intercostal veins

Question 24

Anterior/posterior plexus lie where and contain what

Answer 24

Lie anterior and posterior to root of lungs

Contain parasympathetic and sympathetic fibers