Question

The following diagram shows blood vascular system of cockroach with certain labelled parts a, b and c. Which of the following statements is /are incorrect regarding this system?


a. The blood vascular system of cockroach is of open type with well-developed blood vessels which open into space (haemocoel).
b. The haemolymph is composed of colourless plasma and haemocytes.
c. The labelled part ‘a’ represents anterior aorta emerging from first chamber of heart bearing ostia on either side.

• A. a only
• B. All of the above statements are correct
• C. b and c
• D. a and d

Answer 1

The correct option is A a only

Among the given statements about the circulatory system of the cockroach, the incorrect statement is “A” as well-developed blood vessels are not present in cockroaches but poorly developed blood vessels are present that open into the space known as haemocoel.
Rest statements are correct.