... of the space ( Fig. 1 B′) and mesenchyme (extremely low µ) filling the rest. Shear moduli of other tissues, such as the myocardium and cardiac jelly of the developing heart, have been reported as low as 0.34 µ and 0.07 µ, respectively ( Zamir et al., 2003 ). Finite element models were created in ABAQUS...