Fig. 5. Comparison of heart rate (beats min^–1) and haemolymph velocity, v_HL (mm s^–1) in the posterior aorta, the sternal artery and the left lateral artery in intact (A) and cardioregulatory-denervated (B) Homarus americanus before (t₀–t₁₀), during (t₁₁–t₂₀) and after (t₂₁–t₆₀) the perfusion of Ringer solution (pH 8.0). The vertical dashed lines indicate the infusion period. Data are presented as means ± s.d. (N is given in the respective graphs).