Answer: Haemolymph.
- A Haemolymph
- B Plasma
- C Lymph
- D Serum
Correct answer: A. Haemolymph
Explanation: The cockroach has an open circulatory system in which colourless haemolymph, made of plasma and haemocytes, bathes the body organs directly.
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.