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Krista | 14:22 Tue 16th Apr 2002 | Animals & Nature
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do ants have a heart
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Avatar Image rekstout
Ants certainly have a circulatory system where fluid is distributed by means of a pulsating sac of some sort. They do not pump blood like ours though and they obtain oxygen directly from the air through tubes called spiracles [spelling?].
16:00 Wed 17th Apr 2002
Avatar Image good2skull
And thats why 1950's B-movie style huge monster insects do not exist, this method of respiration ceases to function once the insect reaches a certain size, ie some of the big tropical spiders that are several inches wide but no more.
07:38 Fri 26th Apr 2002

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