I am pretty sure they have simple but very complex digestive systems
worms have complex body systems
Jellyfish have a simple digestive system. They have a digestive cavity with cells lining the wall that carry out the digestive function.
the reason earthworms are more complex than roundworms is b/c they have muscles 2 move with,and have a nervous system and a digestive system.
yes, they have a complete digestive system with organs and a circulatory system with organs.
nephridia
The space is called the coelum, and provides cushioning of the digestive system in earthworms and some other simple animals. It allows the organs to function independently of the external structures.
You do not need any simple sugar in your diet. Your digestive system turns complex carbohydrates into simple sugar. When you eat a potato or a serving of corn, your body will turn it into simple sugar.
The anatomy of the digestive system of the donkey is quite complex. This system is actually very similar to a humans.
because they are simple organism
the digestive system is similar... both have a mouth, stomach and intestine
Mouth is the first part of digestive system where digestion first started it contain teeths in it which help in grinding the food by chewing it and it also contain slaivary enzymes which helps in breaking fo complex food in simple form.
It is better with large amounts of carbohydrates. That is what our digestive system has evolved to digest. Complex carbohydrates and not simple sugars.
The digestive systems of placental mammals varies depending their diets, however, the primary digestive tracts are those with a simple stomach (mono gastric) and those with complex stomachs(ruminant).