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9 Cards in this Set
- Front
- Back
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Reproduction |
Reproduction is the biological process in which new individual organisms are produced |
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Two types of reproduction |
Sexual - the process in which two parents, male and female are required to reproduce Asexual- process in which an organism reproduces on its own without the help of an other organism.. |
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Sexual reproduction |
Two individuals are involved.. each produces a special sex cell known as gamete. Male gamete is know as sperm and female gamete is known as ovum. Fusion of sperm with the ovum is known as fertilastion. It results in formation of a zygote. |
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Hermaphrodites |
Organisms that contain the male and female gametes in one organism is called hermaphrodite. E.g. leach and earthworm |
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Types of fertilisation |
External fertilisation - the fertilisation where in the fusion of the gametes takes place outside the body of the organism e.g. in a hydra Internal fertilisation - the fertilisation where in the fusion of the gametes takes place inside the body of the organisms e.g.reptiles and birds |
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Fertilisation in humans |
It is internal Occurs in the oviduct Result is an embryo Organs involved vagina and penis. Fusion takes place |
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Zygote to the baby |
Zygote=embroyo =foetus=baby The zygote passes the the uterus it then divides an gain and again to form an embryo the embryo gets embedded in the wall of the uterus this is called Implantation. It the grows for two months and resembles a human it is then called foetus. It takes nine months to grow in to a fully formed baby. This period is known as gestation period |
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The foetus depends on the mom for |
Excretion of wastes Nutrients Oxygen Protection |
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Name the following |
Structure that joins the foetus to the uterus n what joins that structure to it Placenta and umbilical chord What protects the foetus Amniotic fluid contained in a sac called anion and placenta What is the premeable and what diffuses. Placenta and oxygen nutrients and wastes like carbon dioxide the period between birth amd fertilisation. Pregnancy |
