Laakkonen Juha, Jernvall Jukka
Division of Veterinary Anatomy and Developmental Biology, Department of Veterinary Biosciences, Faculty of Veterinary Medicine, University of Helsinki, Finland, 00014.
Institute of Biotechnology, University of Helsinki, Finland, 00014.
Anat Rec (Hoboken). 2016 Apr;299(4):538-43. doi: 10.1002/ar.23316. Epub 2016 Jan 27.
We studied the macroscopic anatomy of the lower respiratory tract of the endangered Saimaa ringed seal (Phoca hispida saimensis). Examination of one adult and one young individual found dead showed that trachea had 85 and 86 complete cartilage rings. The adjacent cartilages exhibited very few random anastomoses. There was variation in the confirmation of the trachea between the cranial and caudal part of the trachea. The right lung was divided by partly incomplete inter-lobar fissures into cranial, middle, caudal, and accessory lobes. The left lung consisted of cranial, middle, and caudal lobes. The lungs were characterized by a high amount of interlobular connective tissue. Silicone casts were prepared of the two specimens to visualize the tracheobronchial branching which was similar to that of marine ringed seals but in the Saimaa ringed seal the right middle lobar bronchus originated at the same level as the accessory lobar bronchus.
我们研究了濒危的塞马环斑海豹（Phoca hispida saimensis）下呼吸道的宏观解剖结构。对一只成年和一只幼年的死亡个体进行检查发现，气管分别有85个和86个完整的软骨环。相邻软骨之间的随机吻合很少。气管头端和尾端部分的形态存在差异。右肺被部分不完全的叶间裂分为头叶、中叶、尾叶和副叶。左肺由头叶、中叶和尾叶组成。肺的特征是小叶间结缔组织含量高。我们为这两个标本制作了硅胶铸型，以观察气管支气管分支情况，其与海环斑海豹的相似，但在塞马环斑海豹中，右中叶支气管与副叶支气管起源于同一水平。
