Platyhelminthes
The platyhelminthes digestive system is not as complex as the other digestive system because of the makeup of the organism. The food enters the mouth and is digested into the gastrovascular cavity. Since Platyhelminthes have a gastrovascular cavity, they don't require a circulatory system for their waste. After the food goes through the gastrovascular cavity, the remaining non-digestable pieces comes back out via the mouth
The platyhelminthes digestive system is not as complex as the other digestive system because of the makeup of the organism. The food enters the mouth and is digested into the gastrovascular cavity. Since Platyhelminthes have a gastrovascular cavity, they don't require a circulatory system for their waste. After the food goes through the gastrovascular cavity, the remaining non-digestable pieces comes back out via the mouth