Presentation on theme: "External and *internal changes*"— Presentation transcript:
1 External and *internal changes* Girls and PubertyExternal and *internal changes*
2 Visible changes Breast development -feel sore at times -one often develops before the other-can take 3-5 years before fully developed-often unequal in size-size is primarily determined by genesHeight and weight increase-about 25% of the female adult body is fat (15% of the male body)-23% of the female body is muscle (40% of the male body)-Women can endure some kinds of physical stress more easily than men.(famine, cold, and drought, and do very well in endurance sports)
3 Visible changes… Hips broaden to prepare for delivery of a baby Armpit hairPubic hairHair on arms and legs
4 ?Questions? What are breasts for? What determines breast size? Why do a girl’s hips get wider but a boy’s don’t?
5 Female Reproductive System External GenitalsVulva (labia majora and minora) protects the internal sex organsClitoris –small, sensitive organ located above the opening to the vaginaUrethra, Vagina, Anus 3 openings
6 Internal reproductive Organs Vagina -leads to other internal reproductive organs-used for menstruation, intercourse, childbirth-thin membrane (hymen) surrounds the vaginal openingUterus -also called the womb-where the baby grows-about the size of a pear-enlarges during pregnancy (not the stomach)Fallopian Tubes-2 tubes on either side of the uterus-passageway from the uterus to ovaryOvaries-females have 2-reproductive glands-start producing hormones at puberty-hold about 250,000 ova (eggs) until pubertyOvum -also called egg cell-special cell, when united with male sperm cell, can create a baby (this is called fertilization
7 Female Reproductive System (Handout)Try to label.
9 Use the following words to try to label the diagram: Top diagramAnusVaginal openingUrethraLabia majoraLabia minoraClitoris**Check answers next slideBottom diagramCervixOvaryFallopian tubesRectumAnusBladderVaginauterus
11 Changes in reproductive organs at Puberty Discharge-keeps vagina clean and healthy-varies from whitish and pasty to clear and slippery-if bad odor, may be an infection2) Ovulation-once ovaries start producing hormones, the message is given to start releasing one ovum, once a month, from one ovary-usually a girl cannot feel this happening-if egg is not fertilized in a day or so, it dissolves
12 Menstruation-uterus must prepare for growth of a baby-hormones from ovaries send message to the uterus to grow a thick lining of tissue and blood-lining contains nutrients to nourish the egg and sperm is fertilization occurs-if the egg is NOT fertilized, the lining is not needed to nourish the baby…so the uterus sheds the lining (takes 5-7 days) This is called MENSTRUATION.-once it is shed, a new lining begins to grow-This happens again, that is why it is called a CYCLE.
13 ?Questions? How does it feel if you fall and get a cut on your knee? How does it feel if you have a nosebleed?Do you think having a period is more like cutting your knee or more like a nosebleed? Why?Why does a girl get a period?What does a girl use to absorb the menstrual blood?How does a woman decide which type of menstrual product she will use?
14 Menstrual Products Pads Tampons Various sizes Have adhesive strip which sticks to underwearNecessary to wear protection 24 hours a dayMust change frequently, approx. every 3-4 hoursDispose of in wastebasket (wrap in toilet paper first)Scented pads may irritate some people’s skinTamponsSwimming requires tamponsMenstrual fluid is absorbed within the vaginaOften not used when period first beginsShould be changed every 3-4 hours (TSS-toxic shock syndrome)Held in place by vaginaString to remove tampon-very strongDispose of in wastebasket (wrap in toilet paper first)
15 Review Questions List 4 visible changes in girls during Puberty. What determines breast size?Name 2 external female genitals.Name 2 internal female reproductive organs.Describe Menstruation.Name 2 menstrual products.