. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. 18 PRINCIPLES OF VETERINARY SCIENCE The mammals form a class, in which we are particularly inter- ested, comprising all large domesticated animals. Mammals are air-breathing, warm-blooded, produce their young alive and nourish them for a variable period on a secretion from the mam- mary glands, and have appendages of the skin in the form of hairs. They are divided into a great many natural orders. Most farm animals belong to the order of ungulates. The ungulates are quadrupeds hav- ing molar t
. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. 18 PRINCIPLES OF VETERINARY SCIENCE The mammals form a class, in which we are particularly inter- ested, comprising all large domesticated animals. Mammals are air-breathing, warm-blooded, produce their young alive and nourish them for a variable period on a secretion from the mam- mary glands, and have appendages of the skin in the form of hairs. They are divided into a great many natural orders. Most farm animals belong to the order of ungulates. The ungulates are quadrupeds hav- ing molar teeth adapted for crushing and grinding food, possessing a com- plete set of milk teeth, being destitute of a clavicle or collar-bone, never developing five digits, and having the terminal bone of each digit in- vested by a thick horny covering or hoof. They are divided into two suborders: the perissodactylates, which have an odd number of toes or digits; the artiodactylates, which have an even number. The perissodactylates include only two genera and species: the equus to Diagrammatic which the horse belongs; the asinus transverse section through body to whjch the ass belongs, of a vertebrate: , cavity for „,, . , . , . , , visceral organs; , cavity for *ne amodactylates include among central nervous organs; n., others the following genera and ItTm^B, Ss3rhseet species:theruminantsorcud-chewing tion of invertebrate: , cavity animals, which embrace the ox, sheep, for visceral organs; ».(., nerve g0at, camel, and llama; the omnivora, which embrace the pig. The ruminants remasticate their feed and are cloven hoofed, having two well developed digits on each foot. The omnivora have teeth that are adapted to the mastication of all kinds of food and are provided with four digits on each extremity, two of which are long and two short. THE CHEMICAL CONSTITUTION OF THE ANIMAL BODY It is practically impossible to determine the chemical composi- tion of living organic matter
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920