NATURAL SCIENCE - NEW UNIT
HUMAN BODY AND REPRODUCTION
LESSON: STAGES OF LIFE
...How can we know it?...
We are all born as female or male... And we know that since the moment we come to this world because of our female and male reproductive organs THOSE ARE OUR PRIMARY SEXUAL CHARACTERISTICS...
But there are also SECONDARY SEXUAL CHARACTERISTICS... Which ones are them?
THIS IS OUR LESSON'S SUMMARY:
