Which of the following is present in the human trachea?
A
Ventrally incomplete C-shaped rings of hyaline cartilage
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B
Dorsally incomplete C-shaped rings of elastic cartilage
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C
Dorsally incomplete C-shaped rings of hyaline cartilage
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D
Ventrally incomplete C-shaped rings of elastic cartilage rings
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Solution
The correct option is C Dorsally incomplete C-shaped rings of hyaline cartilage The human trachea is a 10-12 cm long tube that runs from the neck to the anterior part of the thoracic cavity. It is also called the windpipe which is connected to the larynx and the two primary bronchi respectively.
Trachea contains16-20 C-shaped rings of hyaline cartilage are present which are incomplete at the dorsal surface. The outermost layer tunica adventitia is made up of white fibrous connective tissue. The C-shaped cartilages prevent the trachea from collapsing and also provide flexibility.