Based on Pahlavi books, can understand that Kayoumarth and first cow Ivak Dud were born from soil. cow right of the daiti beach and Kayoumarth left of it in Zad Separm.
Cow and Kayoumarth lived three thousand year in peace but devil attacked them and they got sick near the river of Daiti and dead.
Due to having plant essence , 55 grain, 12 species of healing plants were came from the organs of cow.
Then, taken to the moon that everything was in and it was strong.
after cleaning, two creatures came into being.
one of them male and the other one female and 280 different animal were born from them.