Answer :
Final answer:
The open ends of the tracheal cartilages are attached posteriorly by the trachealis muscle and an elastic ligamentous membrane, part of the fibroelastic membrane that allows stretch and prevents collapse of the trachea.
Explanation:
The open ends of the tracheal cartilages are attached posteriorly by both the trachealis muscle and an elastic ligamentous membrane, which is part of the fibroelastic membrane.
This flexible membrane closes the posterior surface of the trachea, connecting the C-shaped cartilages, and allows the trachea to stretch and expand slightly during inhalation and exhalation.
The rings of cartilage provide structural support and prevent the trachea from collapsing. In this context, the correct answer to the student's question is that the open ends of the tracheal cartilages are attached posteriorly by the trachealis muscle and an elastic ligamentous membrane.
