puberty-boys complete男生青春期介绍课件.ppt

Here we will talk about: What is puberty? When changes happen to boys? What are the sex organs? What are erections and why do they happen? For more information you can visit: What’s Happening? What is Puberty? It is the time when our bodies change toward an adult body. Start to develop new feelings and interests Start to make sperm cells Or start to make egg cells What is Puberty? We will talk about the changes that happen that others can seeAnd changes that are private When we talk about these things IT IS NORMAL to feel Comfortable Curious Embarrassed Disgust Excited Shy When do changes happen? anywhere between 8 and 17 most people begin between the ages of 10 and 14 when you start makes no difference to how you develop no age is better any other one When do changes happen? For some, most of the changes happen in a few years For some, changes happen slowly over lots of years THIS IS NORMAL What changes happen to boys? Grow taller and heavier Bones grow bigger and heavier Nose and jaw get bigger and face gets longer Get more muscles Hair and skin can become oily and you may get pimples Body sweats more Hair grows on the face, under the armpits, around the genitals (pubic hair). What changes happen to boys? May get more hair on arms, legs and chest. Voice gets deeper Penis and testicles grow Scrotum changes May have mood swings, sexual thoughts and feelings Breasts may grow What causes these changes? Hormones – chemical messengers that travel in the blood stream from the place where they are made (called glands) to the place where they do their work Each hormone has a specific job The pituitary gland, deep inside your brain, gets things started. It sends out hormones to our sex organs to get them to start making sex hormones? What causes these changes? It is the sex hormones that make the changes that cause children’s bodies grow into adult bodies. ?Both boys and girls make the same sex hormones. The main ones are testosterone and estrogen