In forg’s heart, there are muscular ridges which consist of fibers called
a)	Purkinje fibres	b)	Myonemes	c)	Telodendria	d)	Columnae carnae

(d)

In frog’s heart, a number of muscular ridges called columnae carne projected from the wall of ventricle into its cavity, dividing the peripheral part of the cavity into a number of pockets. It prevent suction that would occur with a flat surfaced membrane and thus impairs the heart’s ability to pump efficiently.