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Snezhnost [94]
2 years ago
9

Planarians lack dedicated respiratory and circulatory systems. This deficiency does not cause a problem because .

Biology
1 answer:
Ostrovityanka [42]2 years ago
8 0

The correct option is (A)  None of their cells are far removed from the gastrovascular cavity or from the external environment.

<h3>Why Planarians lack respiratory and circulatory system?</h3>
  • Although planarians don't appear to have any respiratory or circulatory systems, they do have muscles that line the interior of the body in circular, diagonal, and longitudinal patterns.
  • The flatworm doesn't have lungs, therefore it doesn't require a particular circulatory system like a human does to move oxygen throughout its body.
  • Through its skin, the flatworm merely diffuses oxygen. Anywhere that it would want oxygen, this happens.
  • None of the cells of planarians are a great distance from the gastrovascular cavity or the outside environment, hence they lack specialized respiratory and circulatory systems.

Learn more about the Planaria with the help of the given link:

brainly.com/question/1850129

#SPJ4

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