They breathe through their skin. Air dissolves on the mucus of their skin, so they MUST stay moist to breathe.
If worms dry out, they suffocate. As fresh air is taken in through the skin, oxygen is drawn into the worm's circulatory system, and the worm's hearts pump the oxygenated blood to the head area.
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Explanation:
A star of one solar mass remains in main sequence for about 10 billion years, until all of the hydrogen has fused to form helium.
Answer:
protozoário
Explanation:
esse é o outro termo para protozoários
The statement that does not apply to experimental surgery on animals is that the importance of a sterile surgery is to be decided by the researcher.
<h3>What is surgery?</h3>
A surgical procedure is an intervention that involves the opening of the body of an organism in order to carry it out.
The statement that does not apply in the experimental surgery of animals is that the importance of a sterile surgery is to be decided by the researcher.
Learn more about surgery:brainly.com/question/10479664?
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