The document discusses the senses of smell and hearing. It describes how odor particles activate smell receptors in the nose and how ear wax and membranes in the ear canal can block particles from reaching sensory regions. When sick, inflamed nasal membranes may prevent odors from reaching the olfactory bulb. The document also notes that bugs can occasionally enter the ear, and that alcohol drops or doctor visits may help remove them.
29. Resolution of middle
ear effusion. The
handle of the
malleus is still
foreshortened and
the horizontal.
30.
31. Serous otitis media.
There is in drawing
of a dull ear drum
and the handle of
the malleus is
characteristically
horizontal.
32.
33. Tympanosclerosis. In
some cases of otitis
media healing may not
be completed and the
inflammatory process
leads to the formation
of scar tissue.
34.
35. Central perforation
of the ear drum.
Perforations are
usually single but
may be multiple.
36.
37. Grommet – tympanostomy
tube. Grommets can be
inserted in the tympanic
membrane if medical
treatment and myringotomy
are unsuccessful and the
child has persistent middle
ear effusion.