摘要
白鱀豚上呼吸道具有前庭囊、鼻额囊及前颌囊三对气囊,没有副囊和连接囊。三对囊均右大于左,其中又以前庭囊最为显著。喉由甲状软骨、环状软骨、会厌软骨及一对杓状软骨组成,从喉腔壁的组织学观察发现有室皱襞(假声带)的存在。
The present paper deals with the anatomy and some histology of the upper respira-
tory tract of Lipotes. The observation shows that Lipotes possesses vestibular sacs,
nasofrontal sacs and premaxillary sacs. The three pairs of air sacs are all larger in the
right side than those in the left, and right vestibular sac is the largest. Accessory sac
and connectng sacs are lacking.
Under subcutaneous fat tissue of the head, a pair of 'floating bones' are situated
in both sides of the nasal passage. They are compact connective tissue composed
of irregular collagenous fibers. Capillaries and many fatty vacuoles are distributed in
the surrounding tissue.
The larynx of Lipotes which consists of thyroid, epiglottis and cricoid cartilages, and
a pair of arytenoid cartilages, and which does not differ from that of other Platanistidae.
Plicae (false vocal cords) are present in the tissue of larynx.
