1 What is the most common blood t a AB- b B- СО+ 2 How much do fingernails grow per month? a 0.75 mm b 1.5 mm c 3 mm 3 Where exactly is your heart? a On the left of your chest. b In the middle of your chest. c In the middle of your chest, a b 4 How long are the human intestine a 3.5 m b 8.5 m C 13.5 m