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A functional pronephros develops in vertebrates that have a free-swimming larval stage in their development. [7] Pronephros functions in amphibians in the larval stage, in the adults of some bony fishes, and in the adults of some other fish species. [7] The pronephros is a vital organ in animals that go through the aquatic larval stage.
However, their anatomy and method of digestion differs significantly from that of a four-chambered ruminant. [5] Monogastric herbivores, such as rhinoceroses, horses, guinea pigs, and rabbits, are not ruminants, as they have a simple single-chambered stomach. Being hindgut fermenters, these animals ferment cellulose in an enlarged cecum.
The fifth edition was published in 2020, and was described in a review in the Journal of the American Veterinary Medical Association as remaining "the most comprehensive textbook on the anatomy of the canine body." [13] This edition was edited by de Lahunta, in conjunction with John W. Hermanson. [13]
The function of the omasum is not completely understood. [5] During the second contraction phase of the reticulum, the reticule-omasal sphincter opens for a few seconds allowing a small volume of finely dispersed and well-fermented ingesta to enter the omasum.
Ruminal tympany, also known as ruminal bloat, is a disease of ruminant animals, characterized by an excessive volume of gas in the rumen. Ruminal tympany may be primary, known as frothy bloat, or secondary, known as free-gas bloat. [1] In the rumen, food eaten by the ruminant is fermented by microbes.
The anatomy of bird legs and feet is diverse, encompassing many accommodations to perform a wide variety of functions. [1]Most birds are classified as digitigrade animals, meaning they walk on their toes rather than the entire foot.