What are the tiny coils inside the testicles where sperm is produced

Katie is in high school. what is the best example of how she can be proactive about her health and wellness

Where does a fertilized egg spend most of its time?

Isabel wants to sign up with the online social network teenbook, which she heard about from her friends at school.the teenbook site asked isabel for some personal information to complete her registration.in addition to her full name, teenbook asked for the name of her school, the city where she lives, her age, and her favorite foods.what is the only information that isabel should give to best ensure her safety?