There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
It has been determined that backache syndrome is caused mainly by physical inactivity. For example, employees working whole day in the office sitting down will experience back aches. To prevent back aches, exercise at least twice a day, one in the morning and another in the afternoon.
GMOs or genetically modified organisms
