Question

Development of embryo

Answer 1

$\textbf{Development of Embryo }$:

When zygote forms by fertilisation of sperm and egg, it divides repeatedly to give rise to a ball of cells.

The cells then begin to form groups.

These groups then give rise to different tissues and organs of the body.

This forms embryo, which then get embedded into wall of the uterus.

This their continues to develop, and develops body parts -hands, legs, head, eyes, ears etc.

The foetus then forms, which when get fully developed, the mother gives birth to the baby.

Answer 2

Answer:

During the time, sperms are released into the female body, they enter into the fallopian tube. Out of the many sperms, only one sperm fertilises the egg to form a zygote. This zygote divides a number of times to form a ball of cells. This ball of cells is called the embryo. The embryo moves from fallopian tube into the uterus. Here, it gets attached to the wall of the uterus. As the embryo implants itself in the uterus, the uterine wall starts getting thicker I. order to prepare the uterus for supporting the embryo. The embryo then slowly starts developing into a baby. The cells in the embryo multiply and form distinct body parts such as hands and legs. The stage of the embryo in which all its body parts can be identified is called foetus. The time starting from fertilization till the birth of the baby is known as the gestation or pregnancy period. In human beings the average gestation period is about 280 days. When the gestation period is over, the baby comes out of the mothers uterus through the vagina.

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