CATD= Cartilago arytenoidea, trabecula dorsalis; CCPA= Cartilago cricoidea, pars caudalis; CCPR= Cartilago cricoidea, pars cranialis; CPC= Cartilago procricoidea.
BR= Primary bronchus; LA=Larynx; TR= Trachea; STM= Sternotracheal muscle; SY= Syrinx.