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7B Reproduction. 7B Reproduction. New life. Human reproduction. Pregnancy. Puberty. 7B Reproduction. New life. 7B New life – What is reproduction?. Reproduction is the creation of a new living thing. All species reproduce by creating new individuals called offspring.
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7B Reproduction 7B Reproduction New life Human reproduction Pregnancy Puberty
7B Reproduction New life
7B New life – What is reproduction? Reproduction is the creation of a new living thing. All species reproduce by creating new individuals called offspring.
7B New life - How does a new life start? In most animals, a new life begins when a female egg cell joins with a male sperm cell. egg cell (ovum) sperm cell
7B New life - How does a new life start? When an egg and sperm meet, the two nuclei fuse together to form a new living thing. This process is called fertilisation. How does the fertilised egg contain genetic information from the female parent and the male parent?
7B New life – Reproductive patterns Animals reproduce in different ways to ensure survival depending on their environment. Compare the reproductive patterns of different animals.
7B Reproduction Human reproduction
7B Human reproduction - Adaptations The male body is adapted to produce sperm and pass it on to the female. The female body is adapted so that an egg cell can be fertilised by a sperm cell. The female is also designed to carry the developing offspring until it is ready to be born. How are adult humans adapted for reproduction?
7B Human reproduction - Female or male? These scrambled words are parts of the human reproductive system. gegs tusure estest merps pinalfoal bute snepi motrucs sevario gaivan smerp dctu Unscramble them and decide if they are female or male?
7B Human reproduction – Fertilisation Human reproduction begins with fertilisation.
7B Reproduction Pregnancy
7B Pregnancy - Dangers to fetus A baby is entirely dependent on its mother during pregnancy. Oxygen and food pass across the placenta from the mother’s blood to the embryo’s blood. Some harmful substances can also pass across the placenta with serious effects on the developing baby. Why does a pregnant woman have to be careful about what she takes into her body?
7B Pregnancy - Dangers to fetus Harmful substance Effect on baby Harmful substance A Fetus may be infected with life-threatening disease before it is born. 1 alcohol 4 HIV virus B Oxygen supply is reduced by nicotine and carbon monoxide. 2 drugs 3 smoking C Embryo infected and cannot develop properly. It may be born blind or deaf. 3 smoking 5 Rubella virus D Blood vessels and heart may be damaged. Baby maybe small, born early or born dead. 4 HIV virus 2 drugs 5 Rubella virus 1 alcohol E Baby may be born underweight or brain-damaged. Match the substance to the effect it may have on a developing baby.
7B Pregnancy – Birth F. The amnion splits and the watery amniotic fluid runs out. A.During labour, hormones make the muscles of the uterus contract at regular intervals. C. The muscles of the cervixrelax and the head of the baby passes into the vagina. D.The baby turns so that its head is above the cervix, ready for birth. E.The contractions of the uterus push the baby out through the vagina. B.Contractions continue until the placenta has passed out of the mother’s body. Put these sentences about the stages of birth in the right order. A. During labour, hormones make the muscles of the uterus contract at regular intervals. B. Contractions continue until the placenta has passed out of the mother’s body. C.The muscles of the cervixrelax and the head of the baby passes into the vagina. D. The baby turns so that its head is above the cervix, ready for birth. E. The contractions of the uterus push the baby out through the vagina. F. The amnion splits and the watery amniotic fluid runs out.
7B Reproduction Puberty
7B Puberty - Growing up Humans change as they grow from a baby to an adult. The graph shows the rate of growth for a typical human. Why is the rate of growth not a straight line? When is the growth rate fastest?
7B Puberty - Hormones 1. Most people reach puberty between the ages of… a) 10 and 18. b) 18 and 30. c) 30 and 60. 2. During puberty young people start to develop into… a) astronauts. b) androids. c) adults.
7B Puberty - Hormones 3. Changes during puberty are controlled by special chemicals called… a) hornets. b) hormones. c) horses. 4. Hormones are released inside the body and cause… a)physical changes only. b) emotional changes only. c)physical and emotional changes.
7B Puberty - Hormones 5. Emotional changes during puberty affect… a) feelings and behaviour. b) your hearing. c) the weather. 6. Physical changes during puberty affect the size and shape of… a) …the body. b) …CD players. c) …hornets.
7B Puberty - Hormones 7. After puberty the individual has become… a) sexually mature and is able to produce offspring. b) a professional footballer and is able to go shopping. c) a blackbelt in judo and is able to go travelling. 8. Understanding the science of your body as it changes is important to… a) your neighbours. b) your doctor. c) your health.
