関連ワード:
why is the trachea made of cartilage why is the trachea made of cartilage rings why is the larynx made of cartilage why is the trachea made of hyaline cartilage why is the trachea made up of cartilage and not bone why is the larynx made of hyaline cartilage why is the trachea made of incomplete rings of cartilage why is the trachea made of c rings of cartilage why is the trachea constructed with rings of cartilage in a pig why is the trachea constructed with rings of cartilage fetal pig
