about 8 feet.
yes, they have a complete digestive system with organs and a circulatory system with organs.
the digestive system is similar... both have a mouth, stomach and intestine
I am pretty sure they have simple but very complex digestive systems
yes, planarians have one opening in their digestive system
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.
It does not take a long time, the mouth is the first part of the digestive system.
The human digestive system when stretched out end to end is about 30 feet long.
you people better figure it out or else......
The ORAL CAVITY: Mouth, Tongue, Pharynx,
The food is passed through the digestive tract when the worm moves. The movement causes the muscles to contract and move the food through the system.
Oh, dude, earthworms totally have a digestive system, just like us! They have a long tube-like digestive tract that includes a mouth, pharynx, esophagus, crop, gizzard, and intestine. So yeah, they do have a small and large intestine, but it's not like they're worrying about fitting into their skinny jeans or anything.
long