460 



ZOOLOGY 



SECT. XIII 



division is continuous with the buccal division round the posterior 

 free edge of the soft palate. From the buccal division leads 

 ventrally the slit-like opening of the glottis ^ into the larynx and 

 trachea ; overhanging the glottis is a leaf-like movable flap (Fig. 

 1088, cp.) formed of a plate of yellow elastic cartilage covered 

 with mucous membrane ; this is the epiglottis. Behind, the pharynx 

 becomes continuous with the oesopliagus or gullet («?s.). The latter 



Fig. 1088.— liepus cuniculus. Lateral dissection of the head, neck and thorax. The head 

 and spinal column are represented in mesial vertical section ; the left lung is removed ; the 

 greater part of the nasal septum is removed so as to show the right nasal cavity with its 

 turbinals. aort. dorsal aorta ; &. 7i?/. basi-hyal ; chJ. cerebellum ; cer. cerebral hemispheres; 

 cor. V. coronary vein ; dia, diaphragm ; ep. epiglottis ; en. opening of Eustachian tube into 

 pharynx; Jar. larynx; L^.v. left jugular vein ; ^ s&. «. left subclavian artery ; l.zh.v,\&it 

 subclavian vein ; max. maxilla ; med. medulla ; mes.eth. mesethmoid ; vir. trb. maxillo-turbnial ; 

 res. cesophagus ; olf. olfactory lobe ; j7?. a. pulmonary artery ; 2'. max. premaxilla ; pr. si. pre- 

 sternum ; pt. c. postcaval vein ; rt. Ing. root of left lung with bronchus and pulmonary veins 

 and artery cut across ; s. gl. sub-lingual salivary glands ; s.vix r/l. sub-maxilary salivary gland ; 

 si. sternebrpe ; tnrf. tongue ; tr. trachea ; trb. ethmo-turbinals ; vel. pij. soft palate. 



is a narrow, but dilatable, muscular tube which runs backwards 

 from the pharynx through the neck and thorax to enter the cavity 

 of the abdomen through an aperture in the diaphragm, and opens 

 into the stomach. 



The stomach (Fig. 1089) is a wide sac, much wider at the 

 cardiac end, at which the oesophagus enters, than at the opposite or 

 pyloric end, where it passes into the small intestine. The small 

 intestine is an elongated, narrow, greatly coiled tube, the first 

 part of which, or duodenum (du and ddo'), forms a U-shaped loop. 

 The largo intestine is a wide tube, the first and greater part of 

 which, termed the colo7i, has its walls sacculated, and is continued 

 into a narrow, smooth-walled posterior part or rectum (ret.). At 

 the junction of the small with the large intestine is a very wide 

 blind tube, the cmcum, ■ yvhich is of considerable length and is 



' The tenn glottis is more strictly applied not to this slit, bitt to the slit- 

 like aperture between two folds of the mucous membrane within the larynx — 

 the vocal chordi — which constitute the chief parts of the vocal apparatus. 



