How does this happen? The larynx, your voice box, actually gets bigger during puberty. One of its jobs is to let you talk, sing, hum, yell, laugh, and make all sorts of noises.

　　When a boy reaches puberty, his body begins making lots of testosterone (睾丸素), which causes his larynx to grow and his vocal cords (声带) to get longer and thicker.

　　Before puberty, your larynx is pretty small and your vocal cords are kind of small and thin. That's why your voice is higher than an adult's. As you go through puberty, the larynx changes. As your body adjusts to this changing equipment, your voice may “crack” or “break”. But this process lasts only a few months.

　　Not only do older guys and men sound different from boys, but you can also see the difference in their necks. When the larynx grows bigger, part of it sticks out inside the neck.You can see it at the front of the throat. This is known as the Adam's apple. For girls, the larynx also grows bigger but not as much as in boys, so you can't see it through a girl's skin.

　　Everyone's timetable is different, so some kids' voices might start to change earlier and some might start a little later.Some voices might drop gradually, while others might drop quickly.

　　If this hasn't happened to you yet, don't worry. And if

　　you're going through this now, try not to stress too much about the funny noises you make. It can help to talk to a parent, or a friend who's already gone through the voice change. Before you know it, your voice will sound clear, strong, and more grown­up!

【三维设计2017届高考英语一轮复习提能力创新演练：选修七 Unit21 Human Biology】相关文章：

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (77)

★ 【浙江专用】2014届高考英语一轮复习课时作业(七)必修2Unit 2《The Olympic Games》

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练九

★ 2017届高考英语二轮复习课时训练：8（含解析）

★ 备战2016年高考英语第一轮复习的七大方法

★ 四川省2016届高考英语一轮复习课时作业（39） Module 3 Literature 外研版选修8

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (62)

★ 2017届高考英语二轮复习课时训练：10（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit1《Friendship》

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块5 Unit 3《Science versus nature》