The _cortex is a band of tissue running parallel to the motor cortex that
receives and integrates information related to pain and temperature from all over
the body.
primary visual
auditory
prefrontal
somatosensory

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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