(c) the cartilaginous capsules of the three pairs of sense organs.
The thorn arouses some of the sense organs in the sole of the foot.
So far as is known there are no sense organs by which these sensations are aroused.
We have no sense organs with which it is possible to register such vibrations.
The sense organs are the hairs and bristles and in some species eyes.
We may well conceive that there is a limit to the development of the sense organs.
The sense organs of the shell-valves have already been described.
But the sense organs, themselves, do not do the knowing of the presence of the objects.
This stimulation of our sense organs is the basis or cause of our sensations.
Especially is it dependent upon the brain, nerves, and sense organs.