Library
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The testicle (testis) contains several different cell types. These include the germ cells, which make sperm, the supporting and nourishing Sertoli cells, and the hormone-producing interstitial (or Leydig) cells.
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Thiamine deficiency used to be a common condition due to the fact that in days gone by, raw fish was a common component of a dog's diet. However, commercial manufacturers realized this problem and foods were fortified with thiamine and the disease was rarely seen.
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Thyroid tumours include cystic structures called goitres, multi-nodular overgrowth (hyperplasia), benign (non-spreading) cancers (adenomas) and malignant (spreading) cancers (carcinomas).
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Since dogs have tonsils, they also have tonsillitis. It is quite common particularly in small breeds of dogs.
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It is sometimes said that because cats are fussy eaters they are less easily poisoned than dogs. However, with their curiosity and fastidious grooming, intoxication is not that uncommon.
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Toxoplasmosis is a disease caused by infection with the organism called Toxoplasma gondii (T. gondii), a microscopic single-cell organism which is one of the most common parasites of animals.
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The trachea (windpipe) is a flexible tube leading from the mouth to the lungs. It is supported by a collection of cartilage rings which keep the tubes open, allowing air to enter the lungs on inspiration.
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This is a common tumour, only found in dogs. It has a patchy world-wide distribution including parts of the Caribbean, USA, Southern Europe, Asia and Africa.
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Maintaining nutritional intake in sick cats is vitally important. Unlike healthy cats that are able to reduce their metabolic rate when not being fed, cats that are unwell are unable to turn their rate down and will therefore 'starve' much more quickly.
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Tumours of the blood cells made in the marrow are rare. There is a continuum from dysplasias (abnormal growths) to cancers (myeloproliferative disease).
