Sentence Examples


  • Heart and blood-vessels are entirely absent; the blood is contained in sinuses which have no distinct walls or endothelial lining, and the principal of which are the perianal, the pedal, the visceral and the pallial.
  • It is remarkable that in Scaphopoda only among Mollusca the blood-spaces are in communication with the external medium: a pair of apertures near the renal openings lead from the perianal sinus to the exterior and allow the blood to escape during violent contractions of the body.
  • The perianal sinus.
  • The larva is provided with postoral and perianal ciliated bands, and on either side with a bunch of long provisional setae.
 
 

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