What type of cartilage makes up the tracheal rings that keep the trachea open?
A) Tracheal rings are not made up of cartilage.
B) fibrocartilage
C) elastic
D) hyaline
D
Explanation:
A) The tracheal rings are made up of cartilage.
B) Fibrocartilage does not make up the tracheal rings.
C) Elastic cartilage does not make up the tracheal rings.
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