Fig. 6. Comparison of haemolymph velocity, v_HL (mm s^–1) in the posterior aorta in intact (A) and cardioregulatory-denervated (B) Homarus americanus before (t₀–t₁₀), during (t₁₁–t₂₀) and after (t₂₁–t₆₀) the perfusion of a solution of 2.4 nmol min^–1 g^–1 body mass of adenosine or adenine nucleotides. The vertical dashed lines indicate the infusion period. Data are presented as means ± s.d. (N is given in the respective graphs). All values under the lines with asterisks at each end are significantly different from the control value (P0.05).