The Visible Mucous Membranes
They are the conjunctiva, buckle, nasal and vaginal in the female. These membranes are nor-molly moist and of a light pink color. In local inflammations and in some cases of general disease, there may be discharge from them which may be catarrhal or purulent.
Changes in color of mucous membranes may also be noted in diseases. Thus, they may be
red, congested or injected in specific fevers, painful affections, after severe exercise and in local inflammations.
Brick red mucous membrane is noted in fevers with a tendency to jaundice.
Pallid mucous membranes are indicative ofanaemia or hemorrhage or great congestion of abdominal walls.
Yellow jaundiced or citric mucous membranes are due to jaundice. When a mucous membrane has a bluish or purplish tongue, it is said to be cyanotic. This is due to improper oxygenation of the blood and may be observed in some diseases of the lungs or in diseases of the heart where the circulation is imperfect.
Other changes noted include-
1.Haemorrhage—which may be PetechiaeEcchymosis or Varies streaks—they are noted in Purport hemorrhagic and in some of theSepticaemia hemorrhagic.
2. Ulcers—are noted in nasal mucous membranes of the horse in Ganders.
3. Eruption or Vesicles in the mouth—In foot and mouth disease, Vesicular steatites.