2 For more information you can visit: 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:
4 What is Puberty?It is the time when our bodies change toward an adult body.Start to develop new feelings and interestsStart to make sperm cellsOr start to make egg cells
5 What is Puberty? The cells necessary to make a new human egg + sperm = baby
6 We will talk about the changes that happen that others can see And changes that are private
7 When we talk about these things IT IS NORMAL to feel CuriousDisgustComfortableShyEmbarrassedExcited
8 When do changes happen? anywhere between 8 and 17 most people begin between the ages of 10 and 14when you start makes no difference to how you developno age is better any other one
9 When do changes happen?For some, most of the changes happen in a few yearsFor some, changes happen slowly over lots of yearsTHIS IS NORMAL
10 What changes happen to boys? Grow taller and heavierBones grow bigger and heavierNose and jaw get bigger and face gets longerGet more musclesHair and skin can become oily and you may get pimplesBody sweats moreHair grows on the face, under the armpits, around the genitals (pubic hair).
11 What changes happen to boys? May get more hair on arms, legs and chest.Voice gets deeperPenis and testicles growScrotum changesMay have mood swings, sexual thoughts and feelingsBreasts may grow
12 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 workEach hormone has a specific jobThe 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
13 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 estrogenBoys make lots of testosterone, not so much estrogenGirls make lots of estrogen, not so much testosterone
15 What will I look like when I grow up? That depends mostly on your HEREDITY, the GENES you got when an egg cell and a sperm cell from your birth parents came together to make the cells that developed into you
16 What will I look like when I grow up? Genes mostly determine how tall you will grow, the colour of your hair, the size and shape of your penis or breasts and your overall body shape.Other things that affect our body are the foods we eat, how active we are and how much sleep we get.
17 What are the sex organs? The parts are: These parts are also called the reproductive organs and genitalsThe parts are: UrethraPenisTesticles or TestesScrotum
18 What are the sex organs? Urethra Penis Testicles or testes Scrotum the tube through which urine and semen leaves the boy’s bodyPenistube-like organ that hangs outside the bodycome in all sizes and shapes, determined by our genesTesticles or testesusually two, one hangs lowerSometimes called balls or nutsWhere sperm are madeScrotumbag of skin that holds testicleskeeps them at right temperature to make sperm, slightly cooler than body’s temperaturegets bigger and baggier and turns a darker colour
19 What happens on the inside? Hormones from the pituitary make the testicles grow and they start making more testosterone and producing sperm After puberty you make 200, ,000 sperm cells a day for the rest of your lifeSperm build up in tubes around the testiclesThey travel along some tubes and mix with fluids from glands
20 What happens on the inside? Sperm + fluids = semen
21 How does the semen come out? If semen is going to come out, the penis is likely to be erectA penis gets erect when blood rushes into itMuscles push the semen into the urethra and out the penisThis is called an ejaculation.
22 What can cause an erection? Boys get erections for all kinds of reasons – they might happen if you :Are thinking about something sexyWhen you wake in the morning and have to peeWhen you are relaxedWhen you are anxious or frightenedFor no reason at all
23 What can cause an erection? Boys get their first erections before they are born!
24 When does ejaculation happen? If a boy wakes up and finds a wet, sticky spot on his bedclothes semen came out when he was sleeping. This is called a “wet dream”If a boy touches or rubs his penis and it gets erect and semen comes out. This is called masturbation.Some boys have wet dreams, some don’tSome boys masturbate, some don’tHowever it happens is okay
25 Does penis size matter?Testicles grow first so your penis may look as if it is shrinking.It isn’tIt can take a while for your penis to grow.Penises, like noses and ears and hands, come in all sizes and shapes and colours. They vary how they curve and stick out when erect.Penises, when erect, are more alike in size than when they are soft.They all work.
26 So what are normal feelings? Some guys think about girls and kissing and touchingSome guys think about other guys and kissing and touchingSome guys don’t think about any of this stuffSome have crushes and fall in loveSome don’tSome get angry at parents
27 To learn more about your changing body please visit: