Oyster blood

From: Erich Hoyt (EHoyt@compuserve.com)
Date: Sun Feb 17 2002 - 18:43:38 EST


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Message text written by "Bill Cu;lhane"

"
What does oyster blood consist of? Thank you. Cory, age 12.

"

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Dear Cory,

This is pretty far off the topic of whales and dolphins, BUT the blood of
most bivalves differs from that of mammals because it lacks any respiratory
pigment. Still some species do have hemoglobin and muscle myoglobin, and
sometimes they give the mantle and other tissues a bright red color. The
pulsations of the ventricle in all bivalves is very slow, about 20 per
minute in freshwater bivales which are closely related to freshwater
oysters. Blood typically moves on a circulation route from the heart to the
tissue sinuses to the nephridia then to the gills and back to the heart.

Hope this gives you a bit of information at least. Aren't there any oyster
or other bivalve websites?

Sincerely,

Erich Hoyt



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