Twinkle twinkle little star hopw i wonder.............
Good respiratory system imoroves digestive system. People who does pranayama will know the results
Humans have the most advanced blood and fluid circulatory system.
To avoid from having some circulatory ailments
yes the do
a closed digestive system is when your digestive system is blocked and it stops the food that you eat from getting into your blood stream so the food you eat won't do you any good
probiotics
yes and no!
Yes
Yeah
A very good answer is given in the Related link below.
Because the blood circulates around the body.
According to almost all researches, exercise is very good for your digestive system since it makes your body move and not just be inactive. People need to eat healthy with at least 40 gms of fiber a day in order to maintain a healthy digestive system.