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[2] [3] The word "ruminant" comes from the Latin ruminare, which means "to chew over again". The roughly 200 species of ruminants include both domestic and wild species. [4] Ruminating mammals include cattle, all domesticated and wild bovines, goats, sheep, giraffes, deer, gazelles, and antelopes. [5]
Ovis is a genus of mammals, part of the Caprinae subfamily of the ruminant family Bovidae. [1] Its seven highly sociable species are known as sheep or ovines. Domestic sheep are members of the genus, and are thought to be descended from the wild mouflon of central and southwest Asia.
These ten chromosomes form five unique pairs of XY in males and XX in females, i.e. males are X 1 Y 1 X 2 Y 2 X 3 Y 3 X 4 Y 4 X 5 Y 5. [108] One of the X chromosomes of the platypus has great homology to the bird Z chromosome. [109] The platypus genome also has both reptilian and mammalian genes associated with egg fertilisation.
During the course of evolution, the monotremes have lost the gastric glands normally found in mammalian stomachs as an adaptation to their diet. [37] As such, by some definitions, they do not have stomachs as an organ, [38] although the term is widely used in studies of monotreme anatomy. [39] [40] Monotremes synthesize L-ascorbic acid only in ...
They have elongated and slender snouts that function as both mouth and nose, and which have electrosensors to find earthworms, termites, ants, and other burrowing prey. [7] This is similar to the platypus , which has 40,000 electroreceptors on its bill, but the long-beaked echidna has only 2,000, while the short-beaked echidna, which lives in a ...
Then the food passes into the gizzard (also known as the muscular stomach or ventriculus). The gizzard can grind the food with previously swallowed grit and pass it back to the true stomach, and vice versa. In layman's terms, the gizzard 'chews' the food for the bird because it does not have teeth to chew food the way humans and other mammals do.
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The Etruscan shrew has a very fast heart beating rate, up to 1511 beats/min (25 beats/s) and a relatively large heart muscle mass, 1.2% of body weight. [3] The fur color on the back and sides is pale brown, but is light gray on the stomach. The fur becomes denser and thicker from fall through the winter. [8]