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From: apt@inmet.UUCP
Newsgroups: net.sci
Subject: Re: Do ants have hearts?
Message-ID: <26500004@inmet.UUCP>
Date: Tue, 18-Jun-85 10:11:00 EDT
Article-I.D.: inmet.26500004
Posted: Tue Jun 18 10:11:00 1985
Date-Received: Sun, 23-Jun-85 14:10:15 EDT
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Nf-From: inmet!apt    Jun 18 10:11:00 1985



  As far as I can remember from 9th grade biology, invertebrates have an
"open-ended" circulatory system.  That is, they have a heart (or hearts)
with a tube on opposite ends, one leading to the front and one leading
to the back.  The blood is dumped into the body at one end, flows through 
the tissues to the other end, where it is sucked up again and recirculated.
I'm pretty sure this is true for insects and worms.  Also, worms have five
hearts connected together, like a string of beads.


				Alan Taylor
                                Intermetrics, Inc.
                                Cambridge, Mass.

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