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They cannot eat continuously (there mouth and anus are present in the same opening)

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Which organism uses the same opening for ingestion and egestion?

Organisms that have only one opening in their digestive tract through which food enters and waste exits are known as having an incomplete digestive system. Some organisms with incomplete digestive systems are jellyfish, sea anemones, flatworms, and corals.


What are the simplest digestive compartments.'?

The simplest digestive compartments are the gastrovascular cavities and the alimentary canals. Gastrovascular cavities, found in organisms like jellyfish and flatworms, serve both digestion and distribution of nutrients, having a single opening for both ingestion and egestion. Alimentary canals, seen in more complex organisms, consist of a one-way digestive tract with separate openings for ingestion and egestion, allowing for more efficient digestion and absorption of nutrients.


What disadvantages to a one opening digestive system?

Having a single opening for both ingestion and elimination can increase the risk of contamination and infection from waste material. It can also limit the efficiency of digestion and nutrient absorption, as food may not be fully broken down before being expelled. Additionally, this type of digestive system may restrict the size and complexity of organisms that can be sustained due to the limitations in processing food.


What do flatworms have that sponges and cnidarians dont?

Flatowrms have muscle cells, they are a triploblastic phylum. They have endo, meso and ectoderm layersSponges are Parazoa and lack any true tissue at allCnidaria are diploblastic, having only endoderm and ectoderm


Flatworms are characterized by having....... A. a central nervous system B. radial symmetry C. tentacles for filter feeding D. a complete digestive system?

central nervous system.


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What are the significance of an animal's having two separate opening to the digestive tract as seen in Ascaris?

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