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Other tunicate facts<br />
The tunic that cover their body is a<br />
living tissue with blood vessels. It is<br />
equivalent q to our connective tissue<br />
underneath the skin. But they have<br />
it outside the skin!!<br />
<strong>Tunicates</strong> are the only animals that<br />
reverse their blood circulation.<br />
Their heart is tubular u u and they y have<br />
two pace-makers which take turns.
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