Hank lets us in on the meaning of life, at least from a biological perspective - it's reproduction, which answers the essential question of all organisms: how do I make more of myself? So, sex, how does it work?
Crash Course Biology is now available on DVD! http://dft.ba/-8bCC
Like CrashCourse: http://www.facebook.com/YouTubeCrashCourse
Follow CrashCourse: http://www.twitter.com/TheCrashCourse
Table of Contents
1) Gametes: Ova and Sperm 2:27
2) Sex Determination 4:59
3) Secondary Sexual Characteris
آی-ویدئو