Circulatory system

CIRCULATORY SYSTEM - ARTHROPODS
  • Expansion of blood vessels results in disappearance of blood vessels
  • Their place is taken up by haemocoelic spaces which surround the internal organs
  • These organs are bathed in hemolymph
  • Blood is propelled through the body by the heart
  • Heart is an enlarged or dilated longitudinal dorsal blood vessel
  • It is enclosed in a compartment called pericardium
  • Pericardium is like rest of haemocoel filled with hemolymph
  • When heart pulsates it sucks hemolymph through openings on its wall called OSTIA and expels it again through short arteries (the only blood vessels in the body)
Last modified: Wednesday, 23 June 2010, 5:54 AM