. Outlines of zoology. Zoology. RESPIRA TOR Y S YSTEM. 655 nerves, arising from the fourth cervical spinal nerves. By its contraction the diaphragm alters the size of the thoracic cavity, and thus shares in the mechanism of respiration. At the top of the trachea lies the complex larynx, the seat of the voice in Mammals,. Fig. 287.—Vertical section through rabbit's head.—From a section, with help from Parker's "Zootomy" and Krause. ;«.r., Premaxilla with incisors ; part of mesethmoid partition ; , maxillary turbinals; , ethmoidal turbinal; , part of mesethmoid;
. Outlines of zoology. Zoology. RESPIRA TOR Y S YSTEM. 655 nerves, arising from the fourth cervical spinal nerves. By its contraction the diaphragm alters the size of the thoracic cavity, and thus shares in the mechanism of respiration. At the top of the trachea lies the complex larynx, the seat of the voice in Mammals,. Fig. 287.—Vertical section through rabbit's head.—From a section, with help from Parker's "Zootomy" and Krause. ;«.r., Premaxilla with incisors ; part of mesethmoid partition ; , maxillary turbinals; , ethmoidal turbinal; , part of mesethmoid; , olfactory lobe of cerebrum; fo., pre- sphenoid ; , position of corpus callosum ; bs., basisphenoid with depression for pituitary body; cerebellum ; , basi- occipital; , spinal cord ; «./., nasal passage; gullet; trachea; epg., epiglottis ; smx., submaxillary salivary gland ; , sublingual salivary gland; tongue;//., transverse portion of palatine ; mn., anterior end of mandible. Anteriorly the larynx is supported on its sides and beneath by the thyroid cartilage ; behind this lies the ring-like cricoid ; dorsally to the cricoid are two small triangular arytenoids. Within the larynx there are stretched membranous bands—the vocal cords. Beside the larynx is the paired thyroid gland. Excretory system.—This includes the blood-filtering. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thomson, J. Arthur (John Arthur), 1861-1933. Edinburgh, Glasgow and London, H. Frowde and Hodder & Stoughton
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Keywords: ., bookauthorth, bookcentury1800, bookdecade1890, booksubjectzoology
