Blood is a liquid form of connective tissue! A paradox of our body's terminology. But why is blood called tissue? Because that's how it's interpreted on the histological level🙌🏻 More than half of blood consists of plasma, and the rest is a suspension of its form elements. Those same red blood cells, white blood cells and platelets. There are other, more specific cells, but their number is disproportionately small compared to the form elements.