Chapter 46

Animal ReproductionJARA BHUIYAN & NAFISA REYA

Sexual and Asexual Reproduction

ASEXUAL REPRODUCTION

FissionBudding FragmentationParthenogenesis

SEXUAL REPRODUCTION

Why sex?

External and Internal fertilization

Fertilization in some large water bugs is internal, fewer offspring produced, and greater protection shown.

Many amphibians produce by external fertilization, which produce a lot of offspring.

Different patterns of reproduction

Ovulation

Hermaphroditism

Sex Reversal

Female Reproductive System

Male Reproductive Structures

Sperm and Egg DevelopmentSpermatogenesis

Hormonal Control of Male Reproduction

Reproduction Cycle of Human Female

Development of Embryo in the Uterus

Sources

• http://en.wikipedia.org/wiki/File:Mating_earthworms.jpg• http://www.saburchill.com/ans02/chapters/chap051.html• http://www.tulane.edu/~wiser/protozoology/notes/intes.html• http://www.sciencephoto.com/images/download_lo_res.html?id=806480222• http://bound4life.com/blog/2010/03/31/fetal-pain-nebraska-law• http://bio1151.nicerweb.com/Locked/media/ch46/androgens.html• http://iceteazegeg.wordpress.com/2009/02/25/gametogenesis/spermatogenesis/• http://www.ldysinger.com/ThM_599d_Beg/02_Biology/02_spermat-oogen.htm• http://www.health-res.com/male-and-female-reproductive-systems/• http://faculty.uca.edu/johnc/animal_structure_and_function.htm• http://chrishedstrom.blogspot.com/2007/05/giant-water-bug.html• http://www.nicerweb.com/bio1152/lesson16.html