Understanding the existence of any form of life has been a very fascinating topic since the beginning of time and scientists made sure that no stone is left unturned. Every living being on this planet, which is a result of sexual reproduction, marks the start of its journey on this planet when a female egg is fertilised with male sperm. Let’s find out more about this process.

Fertilisation occurs when a sperm fuses with the female act during intercourse and further forms an egg that gets implanted in uterus of the female. The sperm travels through the fallopian tube and penetrates the zona pellucida layer of the ovum (female egg) and fuses with it which forms zygote (fertilized egg). Thousand of sperms are produced in male body to compensate for the ones unfit and non- motile ones. Once the zygote is formed, it gets implanted in the uterus and further growth takes place when cells start dividing and forming tissues and tissues form organ which results in formation of an organ system, ultimately turning into an organism.

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Life is defined as any system capable of performing functions such as eating, metabolizing, excreting, breathing, moving, growing, reproducing, and responding to external stimuli, the period between birth and death, or the experience or state of being alive.