Question

omposed of simple squamous epithelium. No exchange of gases occurs here. Composed of cuboidal cells. Secrete a fluid containing surfactant. The respiratory membrane is composed of fused basement membrane of the capillary walls and ________. Where the respiratory zone of the lungs begins. Terminates in alveoli.

Answer 1

Respiratory bronchioles

Step-by-step explanation:

Bronchioles open into terminal bronchioles, which are thin-walled branches of the bronchioles further terminal bronchioles transition into respiratory bronchioles occurs

• Respiratory bronchioles are lined by two types of epithelial cells: ciliated columnar cells and club cells( cuboidal cells)
• Walls of respiratory bronchioles are discontinuous, forming openings into alveolar ducts
• Alveolar ducts are conducting regions are lined by knob-like projections of cuboidal epithelium that cover small amounts of smooth muscle
• These projections of cuboidal epithelium are often located on either side of the entrance into alveolar sacs, which branch from the “walls” of the alveolar ducts
• Alveolar sacs are indistinct segments that open into individual alveoli