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KS3 Biology                        7B Reproduction1 of 31     20                          © Boardworks Ltd 2004           ...
Contents                     7B Reproduction              Human sex cells and systems              Ovulation, fertilizatio...
Human reproduction          Reproduction is one of the seven life processes.          All living things reproduce.        ...
The male reproductive system1 of 314    20                                  © Boardworks Ltd 2004                         ...
The female reproductive system1 of 315    20                                    © Boardworks Ltd 2004                     ...
Male or female?1 of 316    20                     © Boardworks Ltd 2004                                             2005
Reproductive system1 of 317    20                         © Boardworks Ltd 2004                                           ...
Sex cells – sperm          In males, the sex cells are called sperm.          Sperm are produced in sex organs called test...
Sex cells – egg          In females, the sex cells are called eggs.          Eggs are produced in sex organs called ovarie...
Sperm or egg?1 of 2010 of 31                   © Boardworks Ltd 2004                                            2005
Contents                      7B Reproduction               Human sex cells and systems               Ovulation, fertiliza...
Ovulation and fertilization           In the female, one of the ovaries produces an egg every           28 days. This is c...
Fertilization and implantation1 of 2013 of 31                                    © Boardworks Ltd 2004                    ...
Word check – reproduction processes1 of 2014 of 31                                         © Boardworks Ltd 2004          ...
Contents                      7B Reproduction               Human sex cells and systems               Ovulation, fertiliza...
The placenta           How does an embryo get food and           oxygen and how does it get rid of waste?           An emb...
The placenta1 of 2017 of 31                  © Boardworks Ltd 2004                                           2005
From embryo to fetus           In the earliest stages of development, a           human baby is called an embryo.         ...
From embryo to fetus – animation1 of 2019 of 31                                      © Boardworks Ltd 2004                ...
From embryo to fetus – activity1 of 2020 of 31                                     © Boardworks Ltd 2004                  ...
Birth animation1 of 2021 of 31                     © Boardworks Ltd 2004                                              2005
Contents                      7B Reproduction               Human sex cells and systems               Ovulation, fertiliza...
What is puberty?           Human children are born with a complete set of sex organs.           However, they do not becom...
Puberty in girls1 of 2024 of 31                      © Boardworks Ltd 2004                                               2...
Puberty in boys1 of 2025 of 31                     © Boardworks Ltd 2004                                              2005
Menstruation           An important part of puberty for girls is the beginning of           their monthly cycle. This is k...
The menstrual cycle1 of 2027 of 31                         © Boardworks Ltd 2004                                          ...
Contents                      7B Reproduction               Human sex cells and systems               Ovulation, fertiliza...
Glossary       egg - The female sex cell.       embryo - The first two months of development of a baby.       fertiliza...
Anagrams1 of 2030 of 31              © Boardworks Ltd 2004                                       2005
Multiple-choice quiz1 of 2031 of 31                          © Boardworks Ltd 2004                                        ...
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Transcript of "7 b reproduction"

  1. 1. KS3 Biology 7B Reproduction1 of 31 20 © Boardworks Ltd 2004 2005
  2. 2. Contents 7B Reproduction Human sex cells and systems Ovulation, fertilization and implantation Embryo development and birth Puberty Summary activities1 of 312 20 © Boardworks Ltd 2004 2005
  3. 3. Human reproduction Reproduction is one of the seven life processes. All living things reproduce. Humans use sexual reproduction to produce their young. In order to do this, the two parents (male and female) have different reproductive systems and organs that produce different sex cells.1 of 313 20 © Boardworks Ltd 2004 2005
  4. 4. The male reproductive system1 of 314 20 © Boardworks Ltd 2004 2005
  5. 5. The female reproductive system1 of 315 20 © Boardworks Ltd 2004 2005
  6. 6. Male or female?1 of 316 20 © Boardworks Ltd 2004 2005
  7. 7. Reproductive system1 of 317 20 © Boardworks Ltd 2004 2005
  8. 8. Sex cells – sperm In males, the sex cells are called sperm. Sperm are produced in sex organs called testes.1 of 318 20 © Boardworks Ltd 2004 2005
  9. 9. Sex cells – egg In females, the sex cells are called eggs. Eggs are produced in sex organs called ovaries. nucleus containing cytoplasm chromosomes membrane jelly coat An egg is so big that this is how small a sperm looks next to it.1 of 319 20 © Boardworks Ltd 2004 2005
  10. 10. Sperm or egg?1 of 2010 of 31 © Boardworks Ltd 2004 2005
  11. 11. Contents 7B Reproduction Human sex cells and systems Ovulation, fertilization and implantation Embryo development and birth Puberty Summary activities1 of 2011 of 31 © Boardworks Ltd 2004 2005
  12. 12. Ovulation and fertilization In the female, one of the ovaries produces an egg every 28 days. This is called ovulation. During sexual intercourse millions of sperm are ejaculated into the vagina. If a sperm meets the egg, the sperm’s nucleus can join with the egg’s nucleus. This fusing of the nuclei is called fertilization.1 of 2012 of 31 © Boardworks Ltd 2004 2005
  13. 13. Fertilization and implantation1 of 2013 of 31 © Boardworks Ltd 2004 2005
  14. 14. Word check – reproduction processes1 of 2014 of 31 © Boardworks Ltd 2004 2005
  15. 15. Contents 7B Reproduction Human sex cells and systems Ovulation, fertilization and implantation Embryo development and birth Puberty Summary activities1 of 2015 of 31 © Boardworks Ltd 2004 2005
  16. 16. The placenta How does an embryo get food and oxygen and how does it get rid of waste? An embryo forms a plate-like structure called the placenta. The umbilical cord joins the fetus to the placenta. In the placenta, food and oxygen diffuse from the mother’s blood into the blood of the fetus. Carbon dioxide and waste products diffuse from the blood of the fetus to the mother’s blood.1 of 2016 of 31 © Boardworks Ltd 2004 2005
  17. 17. The placenta1 of 2017 of 31 © Boardworks Ltd 2004 2005
  18. 18. From embryo to fetus In the earliest stages of development, a human baby is called an embryo. After the first eight weeks of pregnancy, a human embryo is then called a fetus. At this stage the fetus has all the main human features. The fetus continues to develop and grow inside its mothers’ uterus for a total of 40 weeks. What happens next?1 of 2018 of 31 © Boardworks Ltd 2004 2005
  19. 19. From embryo to fetus – animation1 of 2019 of 31 © Boardworks Ltd 2004 2005
  20. 20. From embryo to fetus – activity1 of 2020 of 31 © Boardworks Ltd 2004 2005
  21. 21. Birth animation1 of 2021 of 31 © Boardworks Ltd 2004 2005
  22. 22. Contents 7B Reproduction Human sex cells and systems Ovulation, fertilization and implantation Embryo development and birth Puberty Summary activities1 of 2022 of 31 © Boardworks Ltd 2004 2005
  23. 23. What is puberty? Human children are born with a complete set of sex organs. However, they do not become active until between the ages of 10 and 18. In males, the testes start to make sperm in boys and in females, the ovaries start to release eggs. This stage of development is called puberty. During this important period, many changes take place in the bodies of young men and women.1 of 2023 of 31 © Boardworks Ltd 2004 2005
  24. 24. Puberty in girls1 of 2024 of 31 © Boardworks Ltd 2004 2005
  25. 25. Puberty in boys1 of 2025 of 31 © Boardworks Ltd 2004 2005
  26. 26. Menstruation An important part of puberty for girls is the beginning of their monthly cycle. This is known as the menstrual cycle. The menstrual cycle involves the preparation of the uterus lining so that it is able to receive a fertilized egg. If an egg is fertilized, it can implant itself in the prepared uterus lining. If it is not fertilized, the lining of the uterus breaks down and is lost from the body. This is called menstruation or a period.1 of 2026 of 31 © Boardworks Ltd 2004 2005
  27. 27. The menstrual cycle1 of 2027 of 31 © Boardworks Ltd 2004 2005
  28. 28. Contents 7B Reproduction Human sex cells and systems Ovulation, fertilization and implantation Embryo development and birth Puberty Summary activities1 of 2028 of 31 © Boardworks Ltd 2004 2005
  29. 29. Glossary egg - The female sex cell. embryo - The first two months of development of a baby. fertilization - When the egg and sperm nuclei fuse. menstruation - The monthly cycle in females. ovary - The part of the female reproductive system that produces eggs. ovulation - The release of an eggs from the ovary. placenta - The structure made by an embryo to obtain food and oxygen from its mother. puberty - The time when sex organs begin to work. sperm - The male sex cell. testis - The part of the male reproductive system that produces sperm.1 of 2029 of 31 © Boardworks Ltd 2004 2005
  30. 30. Anagrams1 of 2030 of 31 © Boardworks Ltd 2004 2005
  31. 31. Multiple-choice quiz1 of 2031 of 31 © Boardworks Ltd 2004 2005
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