Henry R W, Haldiman J T, Albert T F, Henk W G, Abdelbaki Y Z, Duffield D W
Anat Rec. 1983 Nov;207(3):435-49. doi: 10.1002/ar.1092070306.
Components of the respiratory system from seven bowhead whales have been examined. The paired and laterally curved external nares are passively closed by a valve-like mass located in the rostral, lateral, and ventral walls of the nasal vestibules. Nasal septal cartilages are paired smooth plates rostrally changing to accordion-like folds caudally. The epiglottic and arytenoidal protuberances of the larynx are typically cetacean, but blunt. The cricoid cartilage is not a complete ring, but an elongated, inverted, trough-shaped structure. The thyroid cartilage is trough-shaped with elongated cranial cornua curving dorsocaudally from each thyroid lamina. A conical mass of skeletal muscle serves as the floor of the short trachea and also surrounds the termination of the laryngeal sac. The trachea is dorsoventrally compressed, lacks a tracheal bronchus, and its width equals its length. The principal bronchi give rise to lobar bronchi at obtuse angles. Large segmental bronchi branch extensively from lobar bronchi near the mediastinal lung surface. The lungs are rectangular and of nearly uniform thickness throughout, without external or internal lobulation.
对7头弓头鲸的呼吸系统组成部分进行了检查。成对且向外侧弯曲的外鼻孔被位于鼻前庭吻侧、外侧和腹侧壁的瓣膜状肿物被动关闭。鼻中隔软骨是成对的光滑板，在吻侧呈板状，向尾侧逐渐变为类似手风琴的褶皱。喉部的会厌和杓状隆起具有典型的鲸类特征，但较为钝圆。环状软骨不是完整的环，而是一个拉长的、倒置的槽形结构。甲状软骨呈槽形，其拉长的甲状软骨上角从每个甲状软骨板向背尾侧弯曲。一块圆锥形骨骼肌构成短气管的底部，并且围绕喉囊的末端。气管在背腹方向上受压，没有气管支气管，其宽度与长度相等。主支气管以钝角发出叶支气管。大的段支气管在纵隔肺表面附近从叶支气管广泛分支。肺呈长方形，厚度几乎均匀，没有外部或内部的叶状划分。
