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Changes at Puberty
Puberty is the time in life when a person’s body changes from that of a child to an adult. Puberty usually starts between the ages of 8 and 13 in girls and 9 and 14 in boys.
The hormones that cause puberty are called sex hormones. In boys, the sex hormones that cause puberty are called testosterone. In girls, the sex hormones that cause puberty are called estrogen and progesterone.
During puberty, the body goes through a number of changes. The most obvious changes are in the body’s shape and size. For example, boys grow taller and their muscles get bigger. Girls grow taller and their hips get wider.
Another change during puberty is that the body starts to produce sex hormones. These hormones cause the body to start changing into an adult. In boys, the sex hormones cause the testes to grow and start to produce sperm. In girls, the sex hormones cause the ovaries to grow and start to produce eggs.
The sex hormones also cause the body to change in other ways. For example, boys start to grow facial hair and their voices get deeper. Girls start to get periods and their breasts start to grow.
One of the most important changes during puberty is the way the body uses energy. The body starts to use energy differently because it is preparing to reproduce. This means that people often feel more tired during puberty. They may also feel hungrier than they did before.
Secondary Sexual Characters:
Secondary sexual characters are physical features that distinguish the sexes of animals. In many cases, these features are used to attract mates. Examples of secondary sexual characters include the antlers of a stag, the plumage of a peacock, and the size of a lion’s mane.