214 MAMMALIA (tHE RABBIT) 



(10) Sketch the ahmentary canal. Name in order all its 

 parts. 



6. The Respiratory System. 



Draw out the tongue and look behind the epiglottis, down into 

 the larynx, and find the vocal cords. The slit between them 

 forms the glottis. 



(1) The Trachea. 



(a) Its structure? 



(b) Into what does it divide before reaching the 



lungs? 



(2) The Lungs. Cut through the diaphragm. 



(a) Size? 



(b) Shape? 



(c) Capacity? 



(3) Sketch the respiratory organs and name the parts. 



7. The Excretory System. 



(1) The Kidneys. Remove the digestive organs and 



identify the bean-shaped kidneys. 



(a) Size? 



(b) Arrangement, alternate or opposite? Any advantage 

 from this arrangement? 



(2) The Ureters. Identify the tube leacUng from each 



kidney to the bladder. 



8. The Reproductive Organs now remain. These may be 

 easily identified. 



9. The Osseous System or Endoskeleton. 



Carefully dissect off all the flesh and viscera, and leave the 

 bony skeleton entire, clean, and uninjured. By the use of 

 wires and double-pointed tacks, mount this skeleton in its 

 proper position on a nicely planed pine board. 



Consult some good figures and name all the bones. 

 (1) The Skull. 



(a) Are the bones distinct or fused together? 



(b) Notice the edges of the contiguous bones. Are 



these wavy, zigzag, or straight? 



(1) What are such joints or unions called? 



(2) How are the bones of the human skull united? 



(See human skeleton or Physiology.) 



