H3 Respiratory System Histo

Question 1

Upper part of the the respiratory system is associated with development of ____. Lower part developed from ____, thus epithelium has ____ origin.

Answer 1

Oral Cavity

Lung bud
Endodermal

Question 2

The role of the conducting division is the clean, warm, and humidify air. Ciliated Pseudostratified columnar epithelium known as ____ sweep the mucous with the trapped particulate matter toward the pharynx.

Answer 2

Respiratory Epithelium

Question 3

List the 3 parts of pharynx and their epithelium:

Answer 3

1. Nasopharynx- ciliated Pseudostratified columnar
2. Oropharynx- nonkeratinized stratified squamous
3. Laryngopharynx- nonkeratinized stratified squamous

Question 4

Vestibular folds (false vocal cords) are covered with ____ epithelium. Core contains many mucoserous glands.

Vocal folds (true) are covered with ___ epithelium. Core contains elastic fibers and skeletal muscle.

Answer 4

Respiratory

Nonkeratinized stratified squamous

Question 5

Bronchi initially have same wall structure as trachea, but then ____ disappears, ____ increases, and height of Pseudostratified columnar epithelial cells ___.

Answer 5

Cartilage rings

Smooth muscle

Decreases

Question 6

Respiratory bronchioles have smooth muscle knobs that are lined with ____ epithelium.

Answer 6

Simple cuboidal

Question 7

____ demarcate and separate adjacent alveoli

Answer 7

Interalveolar septa

Question 8

1. Type I alveolar cells provide ____
2. Type II alveolar cells provide ____
3. Alveolar macrophages (dust cells) provide ____

Answer 8

1. Minimal diffusion barrier
2. Surfactant
3. Air filtration/cleaning

Question 9

The air-blood barrier is composed of these 3 things:

Answer 9

1. Type 1 alveolar cells
2. Endothelial cells
3. Dual basal lamina