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Reproduction in Human and Plants

Reproduction in Human and Plants. Bladder. Sperm duct. Urethra. Scrotum. M ale Reproductive System. Testis. Penis. Oviduct (or Fallopian tube). Ovary. Uterus. Cervix. Vagina. Female Reproductive System. http://health.howstuffworks.com/sexual-health/sexuality/human-reproduction10.htm.

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Reproduction in Human and Plants

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  1. Reproduction in Human and Plants

  2. Bladder Sperm duct Urethra Scrotum Male Reproductive System Testis Penis

  3. Oviduct (or Fallopian tube) Ovary Uterus Cervix Vagina Female Reproductive System http://health.howstuffworks.com/sexual-health/sexuality/human-reproduction10.htm

  4. Egg & Sperm

  5. From fertilised egg to baby

  6. Umbilical cord carries blood between the placenta and the foetus. Umbilical cord

  7. Placenta is an organ that connects the developing foetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply. 7

  8. Heredity Genes are segments of DNA and they are codes for proteins. The genes controlthe characteristics or traits which are passed from one generation to another.Some inherited traits are controlled by a single gene. The following are some examples: Tongue-rolling Detached/attached ear lobes Widow’s peak

  9. Heredity Some inherited traits are controlled by a single gene. The following are some examples: Hitchhiker’s thumb Thumb-crossing Dimples

  10. Reproduction in Plants Female part (pistil) Male part (stamen) Stigma Anther (produce pollen grains) Ovary Filament Ovule (contain female reproductive cell) The pollen grain contains the male reproductive cell. When the anther is mature, it splits open to release the powder-like pollen grains.

  11. Pollination Pollination is the transfer of pollen grains from an anther to a stigma. http://www.mbgnet.net/bioplants/pollination.html

  12. The Fertilisation Story A pollen grain lands on a stigma. It produces a narrow tube called a pollen tube which grows down the style towards an ovule in the ovary. When the pollen tube reaches the ovule, the nucleus of a male reproductive cell from the pollen tube fuses with the nucleus of the female reproductive cell in the ovule to form azygote.

  13. After fertilisation, the zygote divides rapidly and develops into an embryowithin the ovule. The ovule develops into a seed. The ovary, which may contain many ovules, develops into a fruit.

  14. Seed Dispersal

  15. Seed Germination Germination is the process in which a seed starts to develop into a seedling. A seed starts to germinate when its radicle (primary root) emerges through the seed coat, followed by the shoot.

  16. Seed Germination Conditions: Presence of water and oxygen, and temperature. Water is needed to break the seed coat and start the metabolism and growth of the seed. Oxygen is needed for respiration. Temperature affects the metabolism and growth of the seed.

  17. Seed Germination Different types of seeds require different temperatures to start germinating. Most prefer it warm, while some prefer it cold or freezing. Most types of seeds do not need light to germinate as they have food stored in the seed leaf/seed leaves and do not need to carry out photosynthesis.

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