Reproduction in Human and Plants Male Reproductive System

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Reproduction in Human and Plants

Reproduction in Human and Plants

Male Reproductive System Bladder Sperm duct Urethra Testis Scrotum Penis 2

Male Reproductive System Bladder Sperm duct Urethra Testis Scrotum Penis 2

Female Reproductive System Ovary Oviduct (or Fallopian tube) Uterus Cervix Vagina http: //health. howstuffworks.

Female Reproductive System Ovary Oviduct (or Fallopian tube) Uterus Cervix Vagina http: //health. howstuffworks. com/sexual-health/sexuality/human-reproduction 10. htm

Egg & Sperm

Egg & Sperm

From fertilised egg to baby

From fertilised egg to baby

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

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

Placenta is an organ that connects the developing foetus to the uterine wall to

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

Heredity Genes are segments of DNA and they are codes for proteins. The genes

Heredity Genes are segments of DNA and they are codes for proteins. The genes control the 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

Heredity Some inherited traits are controlled by a single gene. The following are some

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

Reproduction in Plants Female part (pistil) Male part (stamen) Stigma Ovary Ovule (contain female

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

Pollination is the transfer of pollen grains from an anther to a stigma http:

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

The Fertilisation Story A pollen grain lands on a stigma. It produces a narrow

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 a zygote

After fertilisation, the zygote divides rapidly and develops into an embryo within the ovule.

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

Seed Dispersal Method of dispersal Animals Examples of plants Mango, berry, papaya, date, burdock,

Seed Dispersal Method of dispersal Animals Examples of plants Mango, berry, papaya, date, burdock, mimosa, love grass Wind Angsana, shorea, sycamore, dandelion, maple, cattail, lalang, milkweed, African tulip (with splitting), kapok (with splitting) Water Coconut, pong, mangrove, lotus, water lily, nipah Flame of the forest, lady’s finger, saga, kapok (with wind dispersal), African tulip (with wind dispersal) Splitting Forcefully Rubber, balsam

Seed Germination is the process in which a seed starts to develop into a

Seed 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.

Seed Germination Conditions: Presence of water and oxygen, and temperature. Water is needed to

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.

Seed Germination Different types of seeds require different temperatures to start germinating. Most prefer

Seed Germination Different types of seeds require different temperatures to start germinating. Most prefer it warm, 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