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pseudo-heart
pseudo-heart n.
Brit. 
/ˈs(j)uːdə(ʊ)hɑːt/
, /ˈs(j)uːdə(ʊ)hɑːt/U.S. /ˈsudoʊˌhɑrt/
Zoology †(a) (in a brachiopod) any of several tubular organs connecting the body cavity and the pallial cavity (obsolete); (b) (in an oligochaete worm) any of several lateral contractile blood vessels which assist in the circulation of blood./ˈsudoʊˌhɑrt/ΚΠ
1856 A. Hancock in Proc. Royal Soc. 8 464 There are usually three apertures opening into the pallial chamber; of these one is the mouth,—the other two are situated at the apices of the organs which have been described as ‘hearts’. In Rhynchonella..there are four such ‘pseudo-hearts’.
1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 465 It is probable that these ‘pseudo-hearts’ subserve the function both of renal organs and of genital ducts.
1939 T. L. Green Pract. Animal Biol. i. 34 ‘Pseudo-hearts’, five pairs of contractile loops lying in segments 8 to 11 which drive blood from the dorsal vessel down to the sub-intestinal vessel.
1999 Invertebr. Biol. 118 185/1 Thin filaments of smooth muscles, such as in the pseudo-heart of the annelid Eisenia foetida.
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