The Lungs

Question 0

Describe the right lung

Answer 0

Three lobes normally but lobes grow depending on restriction
Two tissues:
oblique fissure
horizontal fissure
has an elongated hilum with the bronchi (most superior) veins (most inferior)
gas and liquids go here first as the bronchi is more vertical

Question 1

How does gas exchange take place?

Answer 1

Only thin walls of the alveoli separate the blood from the gas so the pressure gradient allows passage of gas from areas of high concentration to low

Question 2

Describe the left lung

Answer 2

Two lobes
One oblique fissure
A cardiac notch which is an indentation caused by the heart
compact hilum that fits under arch of aorta

Question 3

What is the pleura?

Answer 3

A double layer that protects and lubricates the lung

Question 4

Describe the visceral layer of the pleura?

Answer 4

Sticks to the surface of the lung and is continuous with the connective tissue of the lung

Question 5

Describe the parietal layer?

Answer 5

Adheres to the thoracic wall and diaphragm

Question 6

What is the pleural cavity?

Answer 6

When the double layer of the pleura folds back on itself and leaves potential space between the layers which lubricates motion