Final Answer:
A complete digestive system, also known as an alimentary canal, features a separate mouth and anus. This arrangement enhances the efficiency of food processing and nutrient absorption in organisms compared to those with a single opening for ingestion and waste elimination.
Step-by-step explanation:
The technical term for an organism with a combination of a mouth and anus is "complete digestive system" or "alimentary canal." In organisms with this type of digestive system, ingested food enters through the mouth, travels through a specialized tube (alimentary canal), and waste is eliminated through the anus.
This system allows for more efficient processing of food and absorption of nutrients, as opposed to organisms with a single opening (such as a gastrovascular cavity) where ingested and undigested materials share the same opening.
A complete digestive system, or alimentary canal, is a tube-like structure in organisms that includes a distinct mouth for food intake and a separate anus for waste elimination. This design allows for a unidirectional flow of food, facilitating specialized processes such as ingestion, digestion, absorption, and elimination.
The separation of functions in different regions of the digestive tract enhances the efficiency of nutrient processing and is a characteristic feature in more complex organisms, including many animals. This contrasts with simpler digestive systems, such as gastrovascular cavities, where a single opening serves both as a mouth and an anus, limiting the complexity of digestive processes.