Q.

Animals having open circulatory system POSSESSES –

A. coelenteron
B. spongocoel
C. pseudocoel
D. haemocoel
Answer» D. haemocoel
Explanation: Open circulatory system is the one in which blood does not circulate only inside blood vessels but it also falls in cavities that irrigate tissues. The internal organs are suspended in a network of blood-filled sinuses or open spaces which collectively form the haemocoel.
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