Fig. 10.

SMC orientations and arterial diameters in left carotid arteries at a luminal pressure of $40\mathrm{mmHg}$ in young (age 8 weeks) and old (age 23 weeks) mice ($\mathrm{circular}\mathrm{mean}\pm \mathrm{circular}\mathrm{SD}$ for ${\mathit{\Theta }}_{\mathrm{h}}$, ${\mathit{\Theta }}_{\mathrm{t}}$, and ${\mathit{\Theta }}_{\mathrm{i}}$; $\mathrm{arithmetic}\mathrm{mean}\pm \mathrm{SD}$ for ${\mathit{\kappa }}_1$, ${\mathit{\kappa }}_2$, and diameter). ${}^{\ast }p<0.05$ versus angle zero (Rayleigh test). ${\mathit{\Theta }}_{\mathrm{h}}$, ${\mathit{\Theta }}_{\mathrm{t}}$, ${\mathit{\Theta }}_{\mathrm{i}}$, ${\mathit{\kappa }}_1$, and ${\mathit{\kappa }}_2$ are defined in Fig. 6. SD standard deviation, SMC smooth muscle cell