Q. In a typical heart, if EDV is 120 ml of blood and ESV is 50 ml of blood, the stroke volume (SV) is

1. 120 + 50 = 170 ml
2. 120 – 50 = 70 ml
3. 120 ´ 50 = 6000 ml
4. 120 ÷ 50 = 2.4 ml