関連ワード:
what is the pharynx made out of what is the trachea made out of what is the larynx made out of what is the larynx made up of what cartilage is the trachea made out of what tissue is the trachea made out of what tissue is the oropharynx made up of what is the pharynx composed of what type of cartilage is the larynx made up of what is the inner lining of trachea made up of
