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The section outlines how fertilisation occurs when a sperm cell fuses with an egg cell, forming a zygote. It details the structures involved in the reproductive system of both male and female animals, discusses the types of fertilisation, and introduces in vitro fertilisation as a solution for infertility.
Fertilisations mark the critical beginning of new life in the animal kingdom. This section elaborates that sexual reproduction involves the fusion of male and female gametes—sperms and eggs respectively. Key reproductive organs include the testes, which produce sperms, and the ovaries, which produce eggs. The section distinguishes two types of fertilisation: internal fertilisation, which occurs inside the female's body (as seen in humans and dogs), and external fertilisation, taking place outside the female (common in many fish and amphibians). The formation of the zygote signifies the union of sperm and egg nuclei, leading to embryonic development in the uterus. Additionally, the process of in vitro fertilisation (IVF) is discussed, describing how it can aid in conception when natural fertilisation is not possible. This section is essential for understanding basic reproductive processes and the continuity of species.
Fertilisation: The fusion of sperm and egg cells.
Zygote: The product of fertilisation; the initial cell formed.
Internal vs External Fertilisation: Internal occurs inside the body; external occurs outside.
Embryo Development: The process after fertilisation where the zygote develops.
IVF: A method to assist with fertilisation outside of natural processes.
Fertilisation is quite sublime, two cells unite for new life's climb.
Once upon a time in a pond, a fish and its mate released treasures of life—tiny eggs and sperm—hoping to create young ones in the flowing water.
FERTILISATION - Fusing Eggs Really Takes In Lifesaving Insight, Allowing Transformation of Individual Oviparous Species.
In humans, internal fertilisation is common. The sperm fertilises the egg within the female reproductive system.
Frogs undergo external fertilisation; males and females release their gametes into the water simultaneously.
Term: Fertilisation
Definition: The process of fusion between male sperm and female ovum, leading to the formation of a zygote.
The process of fusion between male sperm and female ovum, leading to the formation of a zygote.
Term: Zygote
Definition: A fertilised egg that is the result of the fusion of sperm and egg nuclei.
A fertilised egg that is the result of the fusion of sperm and egg nuclei.
Term: Internal Fertilisation
Definition: A type of fertilisation where the fusion of gametes occurs inside the female body.
A type of fertilisation where the fusion of gametes occurs inside the female body.
Term: External Fertilisation
Definition: A type of fertilisation where the fusion of gametes occurs outside the female body.
A type of fertilisation where the fusion of gametes occurs outside the female body.
Term: Embryo
Definition: An early stage of development post-fertilisation, where the zygote divides and begins to form tissues.
An early stage of development post-fertilisation, where the zygote divides and begins to form tissues.
Term: Foetus
Definition: A later developmental stage of the embryo, recognizable with identifiable body parts.
A later developmental stage of the embryo, recognizable with identifiable body parts.
Term: In vitro Fertilisation (IVF)
Definition: A medical procedure in which egg and sperm are combined outside the body, leading to fertilisation.
A medical procedure in which egg and sperm are combined outside the body, leading to fertilisation.