A roundworm has a complete digestive tract. It is a deuterostome. The planarian ingests food with one opening and excretes with the same hole... I'd say I'd rather be a roundworm due to that little detail... Wouldn't you?
Lake Pedder planarian was created in 1974.
A planarian can live without food for about a week.
A Planarian is an acoelomate, meaning they do not have a body cavity at all.
No.
No.
The two big dots on a planarian's head are its eyespots, which detect light and help the planarian navigate its environment. They are simple light-sensitive structures that allow the planarian to differentiate between light and dark. They also help the planarian avoid predators and find food.
No, a planarian is an example of a flatworm.
A planarian is a flatworm and is parasitic which means that it feeds off living things.
A roundworm has an open nervous system.
The parasitic roundworm (scientific name: Nematoda) is an invertebrate.
a roundworm has segments setae and a clitella that is about a third from its head
The pharynx in a planarian is located on the ventral side of the body, towards the front end. It is a muscular tube-like structure that extends out of the body to help the planarian feed on prey.