Answer: Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. ... As the fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.
In the topographic classification, diseases<span> are subdivided into such categories as gastrointestinal </span>disease<span>, vascular </span>disease<span>, abdominal </span>disease<span>, and chest </span>disease<span>. ... In the anatomic classification, </span>disease<span> is </span>categorized<span> by the specific organ or tissue affected; hence, heart </span>disease<span>, liver </span>disease<span>, and lung </span>disease<span>.</span>
Answer:
A piloted spacecraft is always manned
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Answer:</h3>
Vertebrates have backbones, while invertebrates do not.
Humans, for example, are vertebrates because we have backbones.
