Question

Attachment of embryo to the wall of the

uterus is known as……..

a. fertilization b. gestation

c. cleavage d. implantation
​

Answer 1

Answer:

The attachment of the embryo to the wall of the uterus is known as implantation.

Explanation:

The events which eventually lead to the birth of a new individual in the case of humans are:

1. Insemination: The male partner inseminates (releases) sperms of male gametes into the vaginal tract of the female during copulation.
2. Fertilisation: Millions of sperm swim across the uterus into the fallopian tubes where one of the sperm fuses with the ova or female gamete to form a zygote.
3. Implantation: The zygote starts actively dividing into many cells (a process known as cleavage). The dividing zygote descends down the fallopian tubes into the fundus portion of the uterus where it sticks (gets attached/embedded) in the uterine wall in the blastula stage.
4. Gestation and Development: Gestation is defined as the period of conception to the delivery of the baby. The embryo gradually develops into a foetus resembling a human. The gestational period in the case of humans is about 9 months in which the zygote becomes a mature embryo/foetus.
5. Parturition: Once the embryo is fully grown, the mother delivers the baby out of her womb. This process is known as parturition or delivery of the baby.

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