The Reproductive System: How Gonads Go - CrashCourse Biology #34 скачать в хорошем качестве

The Reproductive System: How Gonads Go - CrashCourse Biology #34

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? Table of Contents 1) Gametes: Ova and Sperm 2:27 2) Sex Determination 4:59 3) Secondary Sexual Characteristics 6:48 4) Female Reproductive Structures 7:25 a) Uterus & Oviducts 7:40 b) Endometrium (Menstruation) 7:57 c) Cervix & Vagina 8:32 5) Male Reproductive Structures 8:45 a) Scrotum, Sminferous Tubules & Epididymas 8:59 b) Penis 9:37 c) Vas Deferens to Eurethra (Emission) 10:13 References http://www.sciencemag.org/content/281... http://www.medicinenet.com/miscarriag... http://www.ncbi.nlm.nih.gov/pmc/artic...) Campbell Biology, 9th ed. Crash Course is on Patreon! You can support us directly by signing up at   / crashcourse   Want to find Crash Course elsewhere on the internet? Facebook -   / youtubecrashcourse   Twitter -   / thecrashcourse   Instagram -   / thecrashcourse   CC Kids:    / crashcoursekids