domingo, 7 de mayo de 2017

Reproductive System

Primary and Secondary Sex Characteristics

Have a look at these two videos to learn about Primary and Secondary Sex Characteristics


PRIMARY SEX CHARACTERISTICS:


http://study.com/academy/lesson/primary-sex-characteristics-definition-lesson-quiz.html



SECONDARY SEX CHARACTERISTICS:

http://study.com/academy/lesson/secondary-sex-characteristics-definition-lesson-quiz.html

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