138 GENERAL BIOLOGY. 



V. The Excretory Organs. 



1. Note the shape and position of the kidneys. 



2. Trace the ureter from kidney to bladder. 



3. Find the adrenal bodies. 



4. Take out the kidneys. Cut one kidney into 



halves lengthwise and horizontally, and the 

 other into halves transversely (correspond- 

 ing to these planes as the organs lay in the 

 body). 

 Note: 



(a) The cortex. 



(b) The medulla. 



(c) The pelvic cavity. 

 Diagrams ! 



VI The Reproductive Organs. 



1. Identify ovaries or testis (position best found 

 by following out the spermatic artery or 

 vein). 



(a) Ovary : note the Fallopian tube and 



funnel, the uterus, and the vagina. 



(b) Testis : note its relation to the scrotal sac. 



Carefully slit open one scrotal sac. 



Look for the epididymis. Trace the vas 



deferens. 



With bone forceps or knife cut through the 

 symphysis pubis. In the female open the vagina 

 just below the uteri by a lateral cut, and continue 

 this to the external opening. 



