Answer: Haemocytes.
- A Erythrocytes
- B Haemocytes
- C Thrombocytes
- D Leucocytes
Correct answer: B. Haemocytes
Explanation: Cockroach haemolymph lacks respiratory pigment and contains colourless cells called haemocytes suspended in the plasma.
The four basic animal tissue types and their core functions: epithelial (covering/lining), connective (support and transport), muscular (movement), and neural (signal conduction).
Concept context
The four basic animal tissue types (epithelial, connective, muscular, neural) and the cockroach as a model organism for organ-system level organisation.