Blood line is a term used to describe the family tree of an individual, which includes their ancestors and descendants. The crossword solutions for this term are PEDIGREE (8 letters), VEIN (4 letters), AORTA (5 letters), ARTERY (6 letters), ANCESTRY (8 letters) and GENEALOGY (9 letters). PEDIGREE is a term used to describe the ANCESTRY of a person or animal, while VEIN, AORTA and ARTERY are all terms used to describe the circulatory system of the body. ANCESTRY and GENEALOGY are both terms used to describe the study of family history.