Give two differences between a zygote, an embryo and a foetus.
Give two differences between a zygote, an embryo and a foetus.
Comparison between Foetus, Embryo and Zygote:
Zygote
Embryo
Foetus
Definition
Zygote is the fertilized egg which is formed when the sperm and egg are fused together
Embryo is a multicellular diploid eukaryote in its earliest stage
A foetus is the stage of embryo in which all recognizable parts of the body tends to reflect.
Stage
Fertilization to implantation (about two weeks)
After the stage of zygote and lasts until eight week
From the beginning of the third month until birth
Marked by
Sperm and cell nuclie fuse
Main external features of a baby are formed during this stage
organs systems grow and mature.
Origin
Greek zygōtós yoked, equivalent to zygō-, variant stem of zygoûn to yoke, join together
Late Latin, from Greek embruon, from bruein, to swell
Latin fētus bringing forth of young, hence that which is born, offspring,
Changes into
Embryo
Foetus
New born
Comparison between Foetus, Embryo and Zygote:
|
| Zygote | Embryo | Foetus |
| Definition | Zygote is the fertilized egg which is formed when the sperm and egg are fused together | Embryo is a multicellular diploid eukaryote in its earliest stage | A foetus is the stage of embryo in which all recognizable parts of the body tends to reflect. |
| Stage | Fertilization to implantation (about two weeks) | After the stage of zygote and lasts until eight week | From the beginning of the third month until birth |
| Marked by | Sperm and cell nuclie fuse | Main external features of a baby are formed during this stage | organs systems grow and mature. |
| Origin | Greek zygōtós yoked, equivalent to zygō-, variant stem of zygoûn to yoke, join together | Late Latin, from Greek embruon, from bruein, to swell | Latin fētus bringing forth of young, hence that which is born, offspring, |
| Changes into | Embryo | Foetus | New born |
