What kind of family structure consists solely of parents and their children?

The family structure that consists solely of parents and their children is known as a nuclear family. This term specifically refers to a family unit made up of two parents (typically a mother and a father) and their biological or adopted children living together in a single household. This type of family is often contrasted with extended families, which include additional relatives such as grandparents, aunts, uncles, and cousins, all living together or maintaining close ties.

In contrast, blended families refer to families formed when one or both partners have children from previous relationships, leading to a mix of children from different parents. Single-parent families consist of one parent raising one or more children, which differs from the traditional two-parent structure of a nuclear family. Understanding these distinctions helps to recognize the various forms of family organization in modern society.