What are the unique characteristics of phylum Platyhelminthes?
Platyhelminthes is a phylum of flatworms that includes tapeworms, flukes, and planarians. They are bilaterally symmetrical, dorsoventrally flattened, and have a soft, unsegmented body. Platyhelminthes are acoelomates, meaning they have no body cavity. They also lack a circulatory system, respiratory system, and skeletal system.
Platyhelminthes have a unique digestive system. They have a mouth that leads to a pharynx, which is a muscular tube that pumps food into the intestine. The intestine is a long, coiled tube that absorbs nutrients from food. Platyhelminthes also have a protonephridium, which is a simple excretory system that removes waste products from the body.
Platyhelminthes are parasitic or free-living. Parasitic platyhelminthes live on or in other animals, while free-living platyhelminthes live in water or soil.
Unique characteristics of phylum Platyhelminthes:
- Bilaterally symmetrical
- Dorsoventrally flattened
- Soft, unsegmented body
- Acoelomates
- No circulatory system, respiratory system, or skeletal system
- Unique digestive system
- Parasitic or free-living
FAQs:
- What is the body shape of Platyhelminthes? Flattened
- Do Platyhelminthes have a body cavity? No
- What type of digestive system do Platyhelminthes have? Unique
- Are Platyhelminthes parasitic or free-living? Both
- What is the function of a protonephridium? Excretion
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