1. Tardigrade
  2. Question
  3. Biology
  4. Identify the true statement regarding the human respiratory system. A. Tracheal rings are of hyaline cartilage B. Dorsal side of the thoracic chamber is formed by sternum C. Expiration occurs when there is negative pressure in the lungs D. Inspiration occurs when there is positive pressure in the lungs correct option for A and B to complete the given statement.

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Q. Identify the true statement regarding the human respiratory system.
A. Tracheal rings are of hyaline cartilage
B. Dorsal side of the thoracic chamber is formed by sternum
C. Expiration occurs when there is negative pressure in the lungs
D. Inspiration occurs when there is positive pressure in the lungs
correct option for A and B to complete the given statement.

Breathing and Exchange of Gases

Solution:

Trachea - It is about four and half inches long with ‘C’ shaped rings of hyaline cartilage in its walls. These rings of cartilage make the wall collapsible. It is internally lined by pseudostratified ciliated squamous epithelium. Cilia push out the mucous.