is blood tissue
Blood is a highly specialized, fluid tissue. Blood is traditionally classified as a specialized form of connective tissue. To appreciate the basic unity of blood and other varieties of connective tissue, consider the following.1  All of the several blood cell types originate in the connective tissue of bone marrow.Certain white blood cells, notably lymphocytes and monocytes, move freely back and forth between blood and other connective tissues.ll of the several blood cell types originate in the connective tissue of bone marrow. Certain white blood cells, notably lymphocytes and monocytes, move freely back and forth between blood and other connective tissues.