Question

Which of these characteristics is true about the vascular system of cockroach?

(a) Closed type

(b) Red hemolymph

(c) Poorly developed blood vessels

(d) Haemocoel does not contain visceral organs

The question was posed to me in a national level competition.

I'd like to ask this question from Animals Structural Organisations in section Structural Organisations in Animals of Biology – Class 11

Answer 1

Right answer is (c) Poorly developed blood vessels

For explanation I would say: The vascular system in cockroach is of open type. They have poorly developed blood vessels which open up into the haemocoel, where visceral organs are located. The hemolymph is colorless and contains hemocytes and plasma.