Lesson Starter Unscramble the letters to identify parts of the male and female reproductive system SEPNI AGVIAN YARVO STUURE SETTES

Learning Intention To learn about menstruation To be able to describe the process of fertilisation To understand why fertilisation is a difficult process

Ovulation Puberty in females- age 9-14 (approx) 1 egg released from ovary each month OVULATION Fertile- body sexually mature to carry babies Uterus prepares- thick, spongy lining

Menstruation If egg meets sperm- fertilisation, can become baby Unfertilised, lining of uterus and egg pass out Bleed MENSTRUATION (periods) 3-7 days

The Menstrual Cycle Egg maturing  Ovulation  menstruation = menstrual cycle Varies in length for each female Cramps Bloating Mood swings Spots

Fertilisation Day 14 (roughly) of menstrual cycle Egg meets sperm in fallopian tube- fertilised Fertilised egg implants Uterus lining stays No period

Try and answer questions from the video http://www.bbc.co.uk/education/clips/zsrg9j6 Why do most sperm die trapped in the vagina? What percentage of sperm make it to the cervix? Why do the white blood cells kill sperm? How many days can the female body hold the sperm cells for in her fallopian tubes? What happens to the sperm cells when the egg is released? What happens if more than 1 sperm enters the egg cell?

Sexual Intercourse Man inserts penis into female vagina Ejaculates releasing semen Semen= sperm (250 million), fluid, sugar

Journey of sperm Semen released at top of vagina Swims through cervix, uterus, into fallopian tube Approx 48 hours If egg present- fertilisation occurs Strongest sperm fertilises egg

The Zygote Egg and Sperm nucleus fuse- fertilisation New cell= zygote 1 cell divides (2-4-8-16 etc) Implants in uterus Grows into baby

Task Ovulation Menstruation Menstrual cycle Sexual Intercourse Write down the definitions of the new words we have learned today: Ovulation Menstruation Menstrual cycle Sexual Intercourse Ejaculation Semen Fertilisation Zygote