Question

Examples of complete and incomplete digestive system

Answer 1

An incomplete digestive systemconsists of a digestive cavity with one opening. The single opening serves as both mouth and anus. A complete digestive system consists of adigestive tract with two openings

Answer 2

• Complete digestive system- All mammals like humans, apes, and whales; reptiles like snakes; amphibians, fish, birds, and insects have a complete digestive system.

• Incomplete digestive system- Platyhelminthes (flatworms), Ctenophora (comb jellies), and Cnidaria (coral, jellyfish, and sea anemones) are known to have an incomplete digestive system.

The complete digestive system of a being is one where it has separate for entry and exit of food and excretion, respectively. The mouth is the one that is involved with the intake of food. The anus is the path that is concerned about the excretion of waste or roughage.

On the other hand, the incomplete digestive system of a being is one where there is one single opening for both entries of food and the exit of waste. This single opening serves as the mouth as well as the anus.

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