Respiratory

Question 1

Pulmonary Ventilation

Answer 1

• Exchange of air between atmosphere and the alveoli.
• Inhalation and exhalation.

Question 2

External Gas Exchange

Answer 2

Occurs in the lungs as O2 diffuses from the alveoli into the blood and CO2 diffuses out of the blood.

Question 3

Gas Transport in the Blood

Answer 3

Circulating blood carries gases between lungs and tissues, supplying O2 to the cells and bringing back CO2.

Question 4

Internal Gas Exchange

Answer 4

Occurs in the tissues as O2 diffuses from blood to the cells; CO2 travels from the cells into the blood.

Question 5

Structure of Respiratory System

Answer 5

• Nasal Cavity
• Pharynx (Throat)
• Larynx (Voice Box)
• Trachea (Windpipe)
• Bronchus
• Bronchi
• Bronchioles
  *Alveoli
• Lungs

Question 6

Lungs

Answer 6

• Right lung has 3 lobes; Left lung has 2 lobes.
• Left lung has indentation on medial side for accomidating heart.

Question 7

Pleura

Answer 7

• Continuous, double sac covering each lung.
• A serous membrane composed of an epithelial layer overlying areolar tissue.
• Portion attached to chest wall is the Parietal Pleura.
• Portion attached to lung surface is Visceral Pleura.
• Between two layers is pleural space containing a thin film of fluid that lubricates membranes.