Rat

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Rat
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Classification
Kingdom Animalia
Phylum Chordata
Class Mammalia
Order Rodentia
Superfamily Muroidea
Family Muridae
Subfamily Murinae
Genus RattusFischer de Waldheim

• Rats are various medium-sized, long-tailed
  rodents of the superfamily Muroidea. "True rats"
  are members of the genus Rattus, the most well
  known are the black rat, Rattus rattus, and the
  brown rat, Rattus norvegicus.

The brown rat also known as the common rat,
originated from China is Widespread across all
continents except Antarctica. This rat is the
dominant rat in most of Europe and North
America. The black rat is a common long tailed
rodent, thought to originate in tropical Asia. It
is largely confined to warmer areas having been
supplanted from cooler regions and urban areas by
the brown rat. Both brown rats and Black rats
are considered omnivores and eat a wide range of
foods, including seeds, fruit, stems, leaves,
fungi, and a variety of invertebrates and
vertebrates. They can breed throughout the year
if conditions are suitable, a female producing up
to five litters a year. The gestation period is
only 21 days and litters can number up to
fourteen, although seven is common. They reach
sexual maturity in about 5 weeks. The maximum
life span is up to three years, although most
barely manage one.
http//en.wikipedia.org/wiki/Black_rat
http//en.wikipedia.org/wiki/Brown_rat
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1. Temporal bone 2. Zygomatic bone 3. Zygomatic
process frontal bone 4. Frontal bone 5. Nasal
bone 6. Premaxilla
7. Maxilla 8. Upper Insisor 9. Lower incisor 10.
Three upper molars 11. Three lower molars 12.
Mandible 13. Zygomatic process temporal bone
14. Tympanic bulla 15. External auditory
meatus 16. Mastoid process 17. Occipital
condyle 18. Occipital bone 19. Interparietal bone
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1. Occipital bone
2. Interparietal
3. Tympanic bulla
4. Interaural line
5. Temporal bone
6. Bregma
7. Frontal bone
8. Zygomatic arch
9. Premaxilla bone
10. Nasal bone

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1. Occipital condyle
2. Bulla
3. Basioccipital
4. Eustachian tube
5. Basisphenoid
6. Palatine
7. Jugal

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