Powerpoint human reproduction

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Powerpoint human reproduction

  1. 1. HUMAN REPRODUCTION<br />Sexual reproduction is the process<br />involving the fusion of haploid nuclei to form a<br />diploid zygote and the production of genetically<br />dissimilar offspring<br />
  2. 2. MALE REPRODUCTIVE SYSTEM<br />
  3. 3. HORMONES: male<br />Testosterone (testes)<br />Development of male sexual secondarycharacteristics: <br /> - Penis and testes grow: produce sperm and testosterone<br /> - Facial hairdevelops<br /> - Changestolarynx: deepervoice<br /> - Hairgrowsonchest and in armpits<br /> - Pubichairdevelops<br />
  4. 4. FEMALE REPRODUCTIVE SYSTEM<br />
  5. 5. HORMONES: female<br />Oestrogenandprogesterone<br />Development of male sexual secondarycharacteristics: <br /> - Ovariesgrow- eggsdevelop and female hormones are released<br /> - Hairgrows in armpits<br /> - Brestsdevelop/increase in size<br /> - Hipsbroaden<br /> - Pubichairgrows<br /> - Vagina enlargens<br />
  6. 6. Female hormones<br />
  7. 7. OVARIES<br />
  8. 8. MENSTRUAL CYCLE<br />
  9. 9. Fertilisation: thejoining of thenuclei of themalegamete (sperm) and thefemalegamete (egg)<br />
  10. 10. Ovulation and implantation<br />
  11. 11. PLACENTA<br />
  12. 12. BIRTH<br />Itbeginswhenthestrongmuscles in thewall of theuterusstarttocontract. Thisiscalledlabour.<br />Thewall of thecervix, graduallybecomeswideenoughforthebabytobepushedthrough.<br />Thewall of the vagina can stretchtoallowthebabytobepushedthrough.<br />
  13. 13. Birth<br />
  14. 14. AfterbirthThe placenta fallsawayfromthewall of theuterus, and passesoutthroughthe vagina.<br />
  15. 15. ANTE-NATAL CARE<br />Dietplenty of calcium: why?<br />Dietplenty of extra iron: why?<br />Dietwith extra carbohydrates: why?<br />Dietwith extra protein: why?<br />Continuetotakeexercise<br />No smoking: why?<br />Nottoomuch alcohol ordrugs.<br />Avoidillnesses: rubella (deaforotherdisabilities)<br />AIDS: the virus HIV can crossthe placenta<br />
  16. 16. Breastfeeding vs. Milk formula<br />
  17. 17. Advantage of breastmilk vs. Formula milk<br />Free!<br />No needto use anequipment, which, unlesscleanit´seasierfor bacteria togetintothemilk and makethebabyill.<br />Containsantibodiesfromthemother, whichhelpsthebaby ti fight off infectiousdiseases.<br />Closerelationshiptodevelopbetweenmother and baby.<br />Thecompositionchanges as itgrows so that´sexactlyrightforthedifferentstages of development.<br />
  18. 18. BIRTH CONTROL:methods<br />NATURAL ->abstinence<br />CHEMICAL ->contraceptivepill<br /> ->spermicide<br />MECHANICAL ->condom<br /> ->diaphragm<br /> ->IUD<br />SURGICAL -> vasectomy<br />-> femalesterilisation<br />
  19. 19. SOME METHODS OF BIRTH CONTROL<br />
  20. 20. SEXUAL TRANSMISSABLE DISEASES<br />GONORRHOEA<br />AIDS<br />
  21. 21. GONORRHOEA<br />
  22. 22. AIDS: acquiredimmunedeficiencysyndrome<br />

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