Question

The sac like structure into which the fertilised egg falls is
A) Fallopian tube
B) Ovary
C) Vagina
D) Uterus

Answer 1

Hint: The union of male and female gametes is called fertilisation. Fertilisation leads to formation of a zygote. In humans, fertilisation takes place in the female reproductive organ.

Complete answer
The female reproductive system in humans is mainly composed of the following parts-
>Vagina- It is the external part of the reproductive system. It is muscular in nature. It receives the sperms from the males.
>Ovary- It is the main reproductive organ. They are present in pairs. The ovaries produce egg or ovum. It is also responsible for the production of reproductive hormones. The egg further moves to the fallopian tube.
>Fallopian tube-It is a tubular structure that connects the ovary to the uterus. The ovum fuses with the sperms in the fallopian tube. The fertilised egg then moves towards the uterus.
>Uterus- It is a sac like structure which is the most important part of the female reproductive system. The fertilised egg implants in the walls of the uterus and forms embryos. The gestation takes place in the uterus.
                         

Thus, the correct answer is (D). A sac like structure where the fertilised egg falls is the uterus.

Note:
The fertilisation of egg and sperm takes place at the fallopian tube and moves further to the uterus. Implantation takes place in the lining of the walls in the uterus. The foetus grows inside the uterus till the child's birth. If the eggs are not fertilised, the wall of the uterus is shed by the process of menstruation.