Respiratory System

Question 1

Bronchus

Answer 1

Cartilaginous plates in the wall. Smooth muscle and submucous glands. Fewer glands and goblet cells.

Question 2

Bronchiole

Answer 2

No cartilage present. Smooth muscle layer (circumferential). Constriction of these muscles in asthma. Some ciliated cells. Delicate squamous epithelium.

Question 3

Respiratory Bronchioles

Answer 3

Physically see the bronchioles bifurcate into the two respirator. First in the respiratory system, allowing gaseous exchange. Developing alveoli. Smooth muscle and elastic fibers.

Question 4

Aveolar Ducts

Answer 4

The respiratory bronchiole bifurcates into this. Walls almost all made up of alveoli instead of respiratory epithelium.

Question 5

Alveolar Sac

Answer 5

The end of the line.

Question 6

Alveolar Septum

Answer 6

Separates the alveoli. The walls. The blood capillaries run. Endothelial, type I and II alveolar, Interstitial, macrophages. Separates the capillary from the air space.

Question 7

Alveolar Pores (of Kohn)

Answer 7

Collateral air flow. Allow pressure diffusion and air exchange.

Question 8

Type I

Answer 8

90% of the surface area. “Fried Egg.” Responsible for gas exchange. Blood air barrier. They are 40% of the number of cells.

Question 9

Type II

Answer 9

On the edges. Clara cells (in bronchioles as well). They secrete surfactant-like substance and they divide to make the cells mitosis (type I and II differentiation). Lamellar Body is where the surfactant is stored and secreted via exocytosis. 60% of the numbers and only 10% of the surface area.

Question 10

Conduction System

Answer 10

Trachea and bronchi. No gas exchange occurs here.