What is the advantage of having a complete gut? The gut may be a simple sac or highly branched. Accessibility StatementFor more information contact us atinfo@libretexts.org. They lack respiratory organs and therefore respire through their body by the mechanism of simple diffusion They have very complex life cycles which involve one or more hosts. The animal phyla of this and subsequent modules are triploblastic and have an embryonic mesoderm sandwiched between the ectoderm and endoderm. Complete Digestive Tract Advantages The first advantage of a complete digestive tract is continuous food intake. 28.2A: Phylum Cnidaria - Biology LibreTexts Some species also have an anal opening. Complete digestive systems are better able to absorb nutrients, since each organ is separate and can specialize. What are the advantages of an incomplete digestive system? There are several tapeworm parasites of humans that are acquired by eating uncooked or poorly cooked pork, beef, and fish. Some animals, including humans, have a complete digestive tract, meaning it has a clear beginning (the mouth) and a separate end (the anus). Clams and many other mollusks filter water through tiny pores in their gills and trap microscopic food particles in streams of mucus that flow along the gills and enter the mouth; the mucus is kept moving by beating cilia. 15.3: Flatworms, Nematodes, and Arthropods - Biology LibreTexts - Definition, Procedure & Risks, Radiofrequency Ablation: Procedure & Side Effects, Acinetobacter Baumannii Infection: Causes & Symptoms, Preventing & Treating Acinetobacter Baumannii Infection, Actinomyces Israelii: Symptoms & Treatment, Complete Digestive Tract: Definition & Advantages, Physiology II: The Nervous, Immune, and Endocrine Systems, Physiology II - The Nervous, Immune, and Endocrine Systems: Help and Review, Animal Reproduction and Development: Help and Review, Genetics - Principles of Heredity: Help and Review, The Origin and History of Life On Earth: Help and Review, Basic Molecular Biology Laboratory Techniques: Help and Review, Principles of Health: Certificate Program, Principles of Physical Science: Certificate Program, Introduction to Astronomy: Certificate Program, Weather and Climate Science: Certificate Program, High School Chemistry: Homework Help Resource, Digestive System I: The Upper Gastrointestinal Tract, Digestive System II: The Lower Gastrointestinal Tract, Digestive System Functions Lesson for Kids, How the Digestive System Works: Lesson for Kids, Important Functions of Digestion & Related Terminology, Accessory Organs of the Gastrointestinal System Visual Worksheet, The Gastrointestinal System & Digestion Visual Worksheet, Compaction in Geology: Definition & Examples, Zooarchaeology: Definition & Faunal Analysis, Pauli Exclusion Principle: Definition & Example, Working Scholars Bringing Tuition-Free College to the Community, Mechanically: a purely physical process to break down food without changing its chemical composition, Enzymatically: using enzymes (proteins that help biochemical reactions occur) to chemically change consumed food into various other active chemical substances. The overall result is greater efficiency, as well as the potential for special evolutionary modifications for different modes of existence.

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