haemocoel

plural haemocoels · alternative hemocoel · alternative haemocoele

1. biologyThe cavity, between the organs of arthropods and molluscs, through which the blood etc. circulates.

   The brood of this wasp are composed of two types of larvae: typical parasitic larvae, which develop into adult wasps, and precocious larvae, which move about in the host haemocoel but die before pupation.

   1997 November 28, David Pfennig, “Kinship and Cannibalism”, in BioScience, volume 47, number 10, →JSTOR, page 670

   2 more examples

   The remarkable displacement of the cœlom by an irregularly distended system of blood-spaces, “a hæmocœl” (which, Prof. Lankester has elsewhere shown, takes place in the Arthropoda and Mollusca), is lucidly described in this Introduction.

   1901, “Bibliographical Notices”, in The Annals and Magazine of Natural History, volume VII, page 133

   There seems little doubt that these organs, connected as they are with the haemocoel, and everted by haemocoelic fluid pressure, serve as additional respiratory organs, when the larva is in water too deep to enable it to use its tracheal funnel.

   1921, J. Bronté Gatenby, “Description of a peculiar unidentified Dipterous Larva possessing a number of enigmatic truncate Abdominal Organs”, in The Transactions of the Entomological Society of London, page 525