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STD 11 - 7. Structural organisation in animal — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 7. Structural organisation in animal4 Marks
MCQ
Which one of the following has an open circulatory system?
  • A
    Octopus
  • B
    Pheretima
  • ✓
    Periplaneta
  • D
    Hirudinaria
✓

Answer

Correct option: C.
Periplaneta
c
(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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