The capillaries in our bodies are great examples of the Venturi effect. Without it they would burst from the direct pressure of the heart. If you have a saltwater fish tank you would have a protein skimmer. Protein skimmers use Venturi pumps to introduce bubbles into the water stream. Larger water treatment plants will use Venturi tube designs to increase their efficiency. Many uses have come from this concept and it is owed to an Italian physicist named Giovanni Battista Venturi who lived from 1746 to 1822.