Which of the following statements 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

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What are the characteristics of alveoli?

The lungs are covered by which of the following?

It prevents the entry of food into the larynx.

What is the correct pathway of air during respiration?

Which of the following prevents the collapse of the trachea?

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