4Your Changing BodyWhen we talk about these changes it is normal to feel…curiousdisgustcomfortableshyembarrassedexcited
5What is puberty?It is the time when our bodies change from a child’s body to an adult body.Girls – Start to release eggsBoys – Start to make sperm cell
6What is puberty?These are the cells that are necessary to make a new human.
7When do changes happen? Anywhere between 8 and 17 years old? Most people begin between the ages of 10 and 14When you start makes no difference to how you develop.No age is better than any other one.For some most changes happen in a few yearsFor some changes happen slowly over lots of years.
8Boys, Girls, Both Class Activity Adapted from: Beyond the Basics: A Sourcebook on Sexuality and Reproductive Health Education. Canadian Federation for Sexual Health, 2005.
9Girls Boys Get taller and heavier Hips get wider and more curvy Face changes shapeOily skin and hair, pimplesVoices get a little deeperHair grows under the armpits and around the genitalsHair on arms and legs grows darkerBreasts and nipples get largerBody sweats moreInternal and external sex organs growMay have mood swings, sexual thoughts and feelings.Get taller and heavierNose and jaw get biggerFace gets longerGet more musclesOily skin and hair, pimplesBody sweats moreHair grows on the face, under armpits, around the genitalsMay get more hair on arms, legs and chestVoice gets deeperPenis and testicles grow, scrotum changesMay have mood swings, sexual thoughts and feelings
10What causes these changes? Hormones – chemical messengers that travel the blood stream from the place where they are made to the place where they do their work.Each hormone has a specific jobBoth girls and boys make the same sex hormones. The main ones are testosterone and estrogen.Boys make lots of testosterone, and not so much estrogen.Girls make lots of estrogen, not so much testosterone.
11Matching and Labeling Activity Boy PartsMatching and Labeling Activity
13SpermatogenesisHormones makes the testicles grow and they start making more testosterone and producing sperm.After puberty you make 200,000 – 400,000 sperm cells a day for the rest of your life.
14Erection and Ejaculation If semen is going to come 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 ejaculation.
15Erection and Ejaculation If a boy wakes up and finds a wet sticky spot on his pyjamas, semen came out when he was sleeping. This is called nocturnal emissions, or a “wet dream”.Some boys have wet dreams and some don’t.
16Matching and Labeling Activity Girl PartsMatching and Labeling Activity
18MenstruationGirls are born with hundreds of thousands of tiny eggs, called ova – one is called an ovumThese egg cells are only half formedAt puberty hormones tell the ovaries it is time to start releasing ovaUsually one egg at a time matures (develops) and is released from an ovary.
19MenstruationAt the same time the uterus starts to grow a thick lining on the inside wallThe lining has lots of tiny blood vesselsThe lining is there to protect and feed an egg that has combined with a sperm to form a fertilized egg.If the egg does not meet a sperm, the lining is not needed, and is then shed. This is often called a period.
20Questions about Periods When will a girl gets her first period? – No one can tell exactly when it will start.How long will the bleeding last? – It can vary from 3 – 8 days.How much will a girl bleed during her period? – Usually only a few tablespoons.How often will a girl get her period – It is often unpredictable at first but later will arrive between every 23 – 35 days.
21Questions about Periods Will it hurt? – the bleeding itself is not painful, but cramping that can help to remove the blood from the uterus can be uncomfortable.Will people know when a girl has her period? – Not unless she tells them.
22Pads and TamponsGirls use pads or tampons to catch the blood that comes from the vagina.Pads are a sticky strip of material the absorbs the blood. They are placed in the underwear. It should be changed frequently.A tampon is a small plug of material that fits inside the vagina to absorb the blood. This should be changed frequently.
23Daily Checklist for a Changing Body Shower dailyUse deodorant or anti-perspirant on the underarmsWash face daily to help prevent acneBrush teeth twice per dayUse shampoo on your hair to prevent oilynessEat a well balanced dietGet plenty of exercise.