The outer ear is
composed of the earlobe (pinna) and ear canal. The earlobe
collects sound (hence its characteristic
shape) and directed it via the rea canal
where it hits and vibrates the eardrum. The middle ear amplifies the sound and transmits it to the inner ear ( comprised of
the bony labyrinth, a hollow cavity in the temporal bone of the skull with a
system of passages) that has mechanoreceptors that convert the mechanical action of the sound to a nerve impulse.
Difference Between Endangered Species and Threatened Species. ... what are the other causes apart from humans that can drive an entire species to ... When a species exist no longer, it is considered as extinct.
