Hamster

(Movie)

The hamster (Cricetinae) are a group of Mäuseartigen and are usually assigned to the Wühlern. Their distribution area are dry and pol regions of Eurasia. In Central Europe, only the hamster. Fossil are hamsters since the middle Miocene from northern Africa and Eurasia. Most hamsters are not endangered. An exception is the Syrian golden hamsters, as some other than experimental hamsters and pet is important.

The mouse-hamster up rattengroßen are wühlmausartiger shape, but usually with a short tail. They have in every three jaw half rooted molars, whose eminence in two Längsreihen arranged by melting strips crosswise often interrelated. The inner jaw bags used to transport the food.

Body features
Exterior features
Hamsters are mouse-up rattengroß. You are wühlmausartiger shape, but usually with a short, less than halbkörperlangem tail. Your walzenförmiger or rounded body is digging to a way of life and at a locomotion in underground corridors. The partially stummelartig scaled tail is almost function.

The short and powerful limbs of the hamsters are perennial running. The paws serve the ditch, climbing and detention of food and personal hygiene. The thumb is back, and thus the grabenden way of life. Hamster have on the five-toed paws.

A gray to brown fur of hamsters is soft and dense. The tail is naked or hairy, the soles of the feet are usually naked. Among the soles of the rear paws are huge, while climbing collaboratively bales. Hamsters have sharp claws.In the mid-abdomen is a sebaceous gland.

Kauapparat
The hamsters have a myomorphen Kauapparat. Unlike other Mäuseartigen move the lower jaw while chewing diagonally. Charles and employees (2007) presented with a hamster and a Syrian golden hamsters an average of 40.2 degree angle between the axis of the upper molar tooth row and 43 of the tongue facing micro-scratches on the Entoconid the second Unterkieferbackenzahns. The standard deviation was 12.2 degrees.

Bite
The typical Muroidea teeth for the hamster has a total of 16 teeth. In each jaw are half a Nagezahn and three molars. Vorbackenzähne and canines are not available, and each molar tooth row is a big gap zahnfreie by Nagezähnen separated.

Back pockets
Characteristic of the hamsters are the inner jaw pockets. These run along the lower range up to the shoulders and serve the transportation of food.Your opening is located directly behind the spot where the lips and cheeks zahnfreien gap in the teeth of the arch inwards.The bags are of the oral cavity of the deep neck muscles, skin and muscle sphincter Platysma Colli Profundus. The Rückziehermuskel derived from the trapezoid muscle, which acts as a sphincter group of the jaw muscle. At the rear interior wall of the pocket is a forward ragendes, strongly folded tissue. This allows for the enlargement of the pocket when food is taken. Since the pockets Lymphgefäßsystem not possess their cells do not respond to a foreign body.

Sensory organs
The olfactory sense of hamster is well educated and they can use their noses and to locate food quality and edibility. Also good is her sense of hearing. The large, acting as sound funnel ears can hamsters prey animals and Fressfeinde easily perceive. To sleep, the ears and folded. The touch of the hamsters serve the long Tasthaare. With them, you can use the nature of their environment and identify himself in the dark orient. Less well-educated, their facial sense. With the big black eyes, the night and dämmerungsaktiven hamsters not particularly good, but movements and brightness perceive differences.

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