Q. Which of the following statement is true 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
Explanation
Trachea It is about four and half inches long with ‘C’ shaped rings of hyaline cartilage in its walls. These rings of cartilage makes the wall non-collapsible. It is internally lined by pseudostratified ciliated squamous epithelium. Cilia pushs out the mucous
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.