Flatworms (Platyhelminthes) are phylum of unsegmented, soft, flat invertebrates.
Flatworms have no body cavity which is why they are flat. The advantage of a flat body is facilitated respiration and circulation. Flatworms do not have respiration and circulation system. But, oxygen diffuses across the skin and reach all parts of the body thanks to a flattened shape. Also, it is easy to hide from predators because they can get almost everywhere thanks to the body shape.
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25 times with 2 heads, 25 times with two tails, 50 times with one head and one tail.
I think the answer to this is B.
Answer:
The urinary system and Integumentary system
Explanation:
The urinary system is the primary waste elimination system in the body. However, the Integumentary system also eliminates some waste products.
