Thoracic Cavity II: Bronchial Tree

Question 1

Visceral Pleura

Answer 1

Covers the lungs

Question 2

Parietal pleura

Answer 2

• Lines the thoracic cavity

Question 3

Pulmonary ligament

Answer 3

1. Transition b/w Visceral and Parietal pleura at root of the lung
2. Creates tubular passageway through which pass
   - Airways
   - Veins
   - Arteries
   - Lymphatics
   - Nerves

Question 4

Pleural reflections

Answer 4

Cervical dome of pleura

Question 5

Parts of the Parietal pleura

Answer 5

4 total

1. Cervical pleura
   (Top)
2. Costal Part
   (Lateral)
3. Diaphragmatic part
   (Bottom)
4. Mediastinal part
   (Medial)

Question 6

Left lung

Answer 6

• Similar to the right lung
• Cardiac notch begins at 4th Costal Cartilage
• Horizontal at parasternal line
• Medial to costochondral jxn at 6th cartilage

Question 7

The right lung and the left lung BOTH have ____, but the right lung also has a ____.

Two sets of answers

Answer 7

1: Lobes
- Both: Sup/Inf lobes
- Right: Middle lobe

2. Fissures
   - Both: Oblique fissure
   - Right: Horizontal fissure

Question 8

Trachea characteristics

Answer 8

• Supported by “C” shaped cartilage
• In Sup Mediastinum
• Anterior to Esophagus
• Bifurcates into primary bronchi at STERNAL ANGLE

Question 9

Where does the Trachea bifurcate to Primary Bronchi?

Answer 9

At the STERNAL ANGLE

Question 10

Carina

Answer 10

• Located at INF end of Trachea where it branches

- Produces intense cough REFLEX when foreign bodies encounter it

Question 11

Right Bronchus vs Left Bronchus

Answer 11

Right Bronchus
- Shorter, Straighter, and Larger than Left

• Gives off 3 secondary bronchi
  1. Sup
  2. Middle
  3. Inf

Question 12

Aspirated objects are more likely to follow which bronchus?

Answer 12

RIGHT

Question 13

The Left Bronchus is ______ as the Right Bronchus.

Answer 13

Twice as LONG

Question 14

Secondary bronchi supply what?

Answer 14

Lobes

Question 15

Tertiary bronchi supply what?

Answer 15

Lobules

Question 16

Where is the FIRST site of gas exchange?

Answer 16

Respiratory Brinchi

Question 17

What is the angle b/w Primary bronchi?

Answer 17

62 degrees

Question 18

Route from Trachea to Alveoli

Answer 18

Trachea
 -> Primary bronchi
—> Secondary bronchi 
—-> Tertiary bronchi 
——> Respiratory bronchi 
——-> Alveolar sacs
———>Alveoli

Question 19

Blood supply to the lung

Answer 19

• ONE Pulmonary Artery to each lung

- TWO Pulmonary Veins from each lung

Question 20

Parasympathetic Innervation of the Lungs

Answer 20

Vagus Nerve

Question 21

Sympathetic Innervation of the Lungs

Answer 21

Fibers from T1 - T4