Planarians are classified underneath the flatworm phyla, and flatworms have two way digestive systems.
Humans have a complete digestive system. Incomplete Digestive System: one opening that takes in food and expels waste Complete Digestive System: two openings and a food tube to make sure there is no mixing of food and wastes.
One is the stomach
yes, planarians have one opening in their digestive system
Oysters have a two way digestive system. This means that they only have on opening for both food to go in and to come out.
The endocrine & Digestive.
They have complete digestive system.
There is only one organ system that breaks down food. That is the digestive system. However the digestive system uses two processes to break the food down. They are physically and chemically.
The digestive system processes your food and extracts nutrients from it.
A planarian has two longitudinal nerve cords that run along its body length. These nerve cords are connected by transverse nerves, forming a ladder-like nervous system.
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.
The first of the two functions of the digestive system is to break down nutrients. The second function is the absorption of nutrients.
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