Maybe because of the small intestine and there are so many parts to it which makes it very complex.
Koalas have a really long and complicated digestive system because they only eat Leaves( Eucalyptus Leaves mainly), and these leaves contain toxins which allows their digestive system to take a longer amount of time to break down the food and digest.
it has so much mussles and things in the digestive system its awesome!
it purifies the blood so it can help the circulatory, digestive and the respiratory system, so you can stay alive for a long while bro
The stomach is an organ in the digestive system.
The relation between the circulatory system and the digestive system is that the digestive system makes energy so the energy goes to the heart and that is what makes it pump.
Food does not go 'Inside' of your digestive system. It remains 'Outside' of the digestive system. So most of the digestion is extracellular. So from mouth to anus the entire digestive system is connected to the 'Exterior' and is not technically and immunologically 'Inside' your body.
the digestive system.
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
the digestive system begins in the mouth ,so if the blood is not flowing how can the food digest if there is no ooxygen in the blood
The first task of the digestive system is to break down food into a fine pulp (mechanical digestion). When the food is physically broken down, digestive chemicals break the food down into small molecules (chemical digestion). The mouth is the organ in which the process of digestion begins.(Google)
so they know if the patients digestive system is working properly
Blood has to be pumped to the digestive system so that carbon dioxide can be extracted from it. The blood can also absorb nutrients that have just been collected from the digestive system.