One cubic millimeter (mm3) of blood contains 7.0 x 106 red blood cells. How many red blood cells are in 1.0 L of blood Recall that 1 mL 1 cm3.?

To find the number of red blood cells in 1.0 L of blood, we first convert liters to cubic millimeters. Since 1 L is equal to 1,000 mL, and 1 mL is 1,000 mm³, 1 L is 1,000,000 mm³. Given that there are 7.0 x 10^6 red blood cells in 1 mm³, the total number of red blood cells in 1.0 L is 7.0 x 10^6 cells/mm³ × 1,000,000 mm³ = 7.0 x 10^12 red blood cells.