dimensions and general knowledge

Question 1

pressures in arteries, capillaries and veins

Answer 1

arteries 120 - 80 mmHg (systole, diastole)
capillaries 30 - 10 mmHg (arterial, venous)
veins < 7 mmHg

Question 2

variation in hydrostatic pressure of head and feet

Answer 2

head: P - 35
feet: p + 100
(mmHg)

Question 3

dimensions of red blood cell

Answer 3

7.5 x 2 microns