Inheritance means the right to succeed to the estate on intestacy - dying without a legally valid will. Succession means the process by which the heirs acquire the property of the deceased. Inheritance refers to the right to succeed but succession refers to the process of succession. Both concepts are inseparably intertwined.
The law of inheritance constitutes the rules based on which the property of a person died intestate devolves upon his descendants. It starts operating immediately on the death of the owner of the property. Even a child in the womb acquires the right to succession to the property when a person dies intestate.