tambahan sumber

i'm sory sir, its the source :

http://www.sci.sdsu.edu/classes/bio100/Lectures/Lect18/lect18.html
http://www.tutorvista.com/content/biology/biology-iv/reproduction-in-animals/human-female-reproductive-system.php

thanks very much..

ika dwi lestari XII A2 (14)