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Body Fluids and Its Circulation question

2006 · Q11
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Body Fluids and Its Circulation question

2006 · Q11

NEETBiologyBody Fluids and Its CirculationMCQ+4 / −1
Which one of the following has an open circulatory system?
  1. A
    Octopus
  2. B
    Pheratima
  3. C
    Periplaneta
  4. D
    Hirudinaria
View written solutionFree

Correct answer: C

Periplaneta has open circulatory system i.e., the blood does not flow in blood vessels but flows in a haemocoel (body cavity). The circulatory systems of all vertebrates, as well as of annelids (for example, earthworms) and cephalopods (squid and Octopus) are closed, in which the blood never leaves the system of blood vessels consisting of arteries, capillaries and veins.

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