Available Answers

1. 1.

   Fill in the blanks.

   1. The fusion of a sperm and an egg outside the parent body is called ____________ fertilization.
   2. In humans, the male sex cell is called ________ and is produced by ____________.
   3. The stage in a women's life when menstrual period stops permanently and she is no longer able to bear children is called ___________________.
   4. Fertilization in mammals takes place in the ________________.
   5. A menstrual cycle is normally of __________ days.
   6. The embryo is attached to the ___________ by a special structure called placenta.
   7. The sac-like structure in which the embryo is enclosed and filled with a fluid is called __________ fluid.
2. 2.

   Define Fertilization.

3. 3.

   Define Menstruation.

4. 4.

   Define Pregnancy.

5. 5.

   Define Umbilical Cord.

6. 6.

   Define Placenta.