The blood passes through our body in a sytem called the circulatory system. we have a double circulatory system. why is it called this and what are the two pathways that blood takes?

We call it

Double circulation bcoz their are 3 circulation exist between heart, lungs and body organs.

EXPLANATION :

Flow of blood is left to right

1. Pulmonary circulation

Right ventricle -pulmonary artry - lungs - pulmonary veins - left artria

2. Systemic circulation

Left ventricle - systemic artry - body organs - systemic veins- right artria

The answer is .5 g/day.

We can find this answer by dividing the grams lost by the days.

30-20=10 is the grams lost.

10/20=.5

Hope this helps!