Blood relatives are individuals who are related to each other through a common ancestor. The term 'blood relatives' can refer to both immediate family members, such as parents, siblings, and children, as well as more distant relatives, such as cousins, aunts, and uncles. In crossword puzzles, the terms 'KINDRED' (7 letters), 'KINSMEN' (7 letters), and 'KIN' (3 letters) are all used to refer to blood relatives.