96 



GENERAL ZOOLOGY 



Fig. 63. — Median section of the human body showing the alimentary canal 

 and other viscera diagrammatically disposed; bone is shown in solid black. 1, 

 external nares; 2, mouth; 3, nasal passage; 4, pharynx; 5, tongue; 6, epiglottis; 

 7, larynx; 8, trachea; 9, esophagus; 10, sternum; 11, pleural cavity; 12, lung; 

 13, heart; 14, diaphragm; 15, abdominal cavity; 16, duodenum; 17, liver; 18, 

 stomach; 19, large intestine; 20, jejuno-ileum; 21, vermiform appendix; 22, kid- 

 ney; 23, ureter; 24, bladder; 25, urethra; 26, anus, 27, coccyx; 28, sacrum; 29, 

 neural spine of first lumbar vertebra; 30, centrum of first thoracic vertebra; 31, 

 spinal cord; 32, cerebellum; 33, cerebrum; 34, pituitary body. 



