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Included are mice, rats, gerbils, hamsters, lemmings, and voles. They are grouped according to the structure of their jaws and molar teeth . They are characterized by their myomorphous zygomasseteric system , which means that both their medial and lateral masseter muscles are displaced forward, making them adept at gnawing.
Rats and mice typically have approximately 30 macrovibrissae on ... A small muscle 'sling' is attached to each macrovibrissa and can move it more-or-less ...
Spalacids are mouse- to rat-sized rodents, adapted to burrowing and living underground.They have short limbs, wedge-shaped skulls, strong neck muscles, large incisor teeth, and small eyes and external ears.
Sciuromorpha (/ s ɪ ˈ j uː r ə m ɔː r f ə / 'squirrel-like') is a rodent clade that includes several rodent families. It includes all members of the Sciuridae (the squirrel family) as well as the mountain beaver species.
Goose bumps are created when tiny muscles at the base of each hair, known as arrector pili muscles, contract and pull the hair straight up. The reflex is started by the sympathetic nervous system, which is responsible for many fight-or-flight responses. The muscle cells connected to the hair follicle have been visualized by actin ...
The organisation of the mystacial vibrissae and corresponding barrels is so consistent that there is a naming convention to identify each whisker in rats and mice. Rows are designated A to E from top to bottom, and columns of whiskers within each row are numbered from back to front.
Female rats wiggle their ears when they are in heat, to excite male rats and encourage them to mate. [4] Ear wiggling was a shtick in Hal Roach comedies such as Laurel and Hardy and Our Gang. To achieve this effect, performers such as Stan Laurel would have their ears pulled by threads which would not be visible in the film. [5]
Rats are typically distinguished from mice by their size. Usually the common name of a large muroid rodent will include the word "rat", while a smaller muroid's name will include "mouse". The common terms rat and mouse are not taxonomically specific. There are 56 known species of rats in the world. [1]
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