7. Give the preventive and curative treatment of inflammation of the brain.

8. State the causes, and give the proper treatment of paralysis of the
posterior portion of the body.




CHAPTER XI

DISEASES OF THE SKIN


GENERAL DISCUSSION.--The two layers that form the skin are the _epidermis_
and the _derma_. The cells of the outer layer or epidermis are of two
kinds. The superficial portion is formed by horny, flattened cells and the
deeper by softer cells. This layer of the skin varies greatly in thickness
in the different species. The derma is composed of some muscular fibres
interwoven with the connective-tissue fibres. It contains the roots of the
hair follicles, sweat and oil glands. The external face which is covered by
the epidermis shows a multitude of little elevations. These are the
vascular and nervous papillae. In addition, it shows openings through which
the hairs and the skin glands pass. The inner surface is united more or
less closely to the muscular or underlying tissue by a layer of fibro-fatty
tissue.

_The appendages of the skin_ are the hairs and horny productions. The horny
productions comprise the horns, chestnuts, ergots, claws and hoofs.

_The hair varies_ in length, thickness and coarseness in the different