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The hormonal system and the nervous system coordinate all the digestive and absorptive processes. Digestion is how the body breaks down foods and gives the body nutrients.
2 way digestion
Both are equally efficient. Since they are two different systems designed for two different animals there is no point in comparing them.
Energy is made from oxygen and glucose, when reacted together. Oxygen enters the body via the respiratory system and glucose enters through the digestive system. These two systems link as they both provide the formulae for energy. When glucose and oxygen are both in the body, the cardiovascular transports it via blood to the place in which it is needed in the body, for example the muscles. This is also links with the digestive and respiratory system as it provides the transportation of the energy.
Your nose and lungs...
Cheeks and Brain
There are two forms of digestion: mechanical and chemical digestion.
mechanical and chemical digestion
For best results: two separate hard drives, if not, two separate partitions. Two separate operating systems and a bootloader capable of loading multiple operating systems are requirements.
California requires sprinkler systems in newly built one and two story residences. Sprinkler systems are also required for condominiums.
"musculoskeletal"
The Skeletal System and the Muscular System.