(1) There was thick wall and no dendrite in mechanoreceptor.

(2) To develop a measurable method of ventricular mechanoreceptor reflex sensitivity and investigate the effect of buffering nerve on it.

(3) These mechanoreceptor organs, like the hair cells in the human ear, mechanically transmit the stimulus of touch or sound waves.

(4) The rare males have sub-spherical frontal knobs, with spines and mechanoreceptor on surfaces. In the basal part of penis, the rare males have evident spine-like outgrowths.

(5) The adaptation in Guianadolphins is fairly new, Hanke says, and he suspects that "it is relativelyeasy to evolve, to change mechanoreceptor organs into electroreceptors".