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Read the given statements about the bloo...

Read the given statements about the blood vascular system of cockroach.
I. The circulatory system of cockroach is of closed type
II. It contains no blood vessels except aorta of the heart .
III. The heart is 6 - chambered.
IV The haemolymph is composed of coloruless plasma and haemocytes.
Which of the statement (s) given above is / are INCORRECT ?

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