Given below are two statements.
Statement I : The blood vascular system of a cockroach is classified as an open type.
Statement II : The blood vessels in cockroaches are poorly developed and open into the haemocoel, where the visceral organs are bathed in haemolymph.
In light of the above statements, choose the correct answer from the options given below.

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Statement I is incorrect but statement II is correct.

Statement I is correct but statement II is incorrect.

Both statement I and statement II are incorrect.

Both statement I and statement II are correct.

answer is A.

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Detailed Solution

The blood vascular system, or circulatory system, of a cockroach is considered an open circulatory system. In an open circulatory system, the blood or circulatory fluid, known as hemolymph, is not enclosed within a network of blood vessels as it is in organisms with closed circulatory systems, such as humans.

The colorless plasma and haemocytes in the haemolymph contribute to the overall transport and maintenance of physiological processes in the cockroach. The haemolymph bathes the organs directly within the haemocoel, the open body cavity, facilitating the exchange of substances between cells and the circulatory fluid.

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