Cartilage rings present in trachea which prevent it from collapsing and keep the air passage way open, are:
Correct answer: B. "C" shaped
- A. "O" shaped
- B. "C" shaped
- C. "D" Shaped
- D. "G" shaped
Explanation
C-shaped cartilaginous rings reinforces the anterior and lateral sides of the trachea to protect and maintain the airway open. (The cartilaginous rings are incomplete because this allows the trachea to collapse slightly to allow food to pass down the esophagus.)
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The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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