Analogies to Muscle Function and Fine Structure

2 Analogies to Muscle Function and Fine Structure The Boulder Analogy 

The following associations can be made to the biological model for the analogy presented. Boulders = Z-membranes ropes connected to boulders = actin filaments central bracing = myosin filaments men = myosin heads arms directed diagonally outward = actin-myosin crossbridges (Fig. 9.2 and Fig. 9.3e). 

A photo taken with an electron microscope with the same orientation (longitudinal section) is displayed in Fig. 9.3f. The actin filaments run toward each other from the net-like Z-membrane structures the crossbridges, radiating outward from the thick, centrally located myosin filaments to the actin filaments, are plainly visible. 

---