Topic: Animal
Animals are a group of multicellular organisms, eukaryotic, are classified as World Animal in 5 international classification system. Our body grows as development. Most animals have the ability to move spontaneously and independently. Animals were divided into small groups, some of which ladong vertebrates; molluscs; arthropods, worms combustion (earthworms and leeches); sponges and jellyfish.
The vertebrates: birds (warblers robin, songbird, bird strikes, pigeons, starlings garage), mammals (mountain forest: elephants, deer, tigers, leopards, bears, monkeys, rhinos ...; plain: dogs, cats, pigs, cattle ..), amphibians (frogs, imitation, toads, salamanders ...), reptiles (turtles, dinosaurs, crocodiles, snakes ...) , fish (fresh water fish: catfish, perch, carp, gobies ..; brackish water: dolphins, whales, sharks ..)
Mollusks: clams, oysters (and they with clams, scallops), octopus, squid (Squid, the pen leaves, the Cuttlefish, Squid sets Ma (Squid Soap) ,, snails
arthropods: lobster (lobster, prawns, crayfish ,,), beef Leggings, nhencon identical (mosquitoes, flies, cockroaches, bees butterflies ...)
We learn about a particular animal: the animal leaves cho.cho very close and familiar with humans, dogs are known to be a pet of the master general. The ancestors of dogs, including foxes and coyotes are a mammalian species almost like mink live in tree hollows around 400 million years ago. And as our dogs see today evolved from a small dog, gray. In the late Ice Age, about 40,000 years ago, wolves and people live together in groups hunting in packs. The wolf and human prey compete, even kill each other. But really, the wolf began to scavenge the scraps left by humans. Humans have domesticated the wolf and through crossbreeding generations, wolves evolved into dogs ,. The average gestation period of the dog lasts about 60 to 62 days, maybe sooner or extended to 65 days. [2] [3] At the first start, dogs without teeth but after only 4 weeks of age may have 28 teeth. Complete jaws of this mammal is 42 units.
When the body is hot, often tongue breathing dog to cool
dog's eyes have 3 eyelids: an upper eyelid, a lower eyelid and the third eyelid located in the middle, deep breath inwards, help protect the eyes from dust. Their ears are hearing, they can get only 35,000 sound vibrations per second. Our sense of smell is also as natural hearing. One can smell the food somewhere in the kitchen but the dog can distinguish each spice in the pot, even hunting dogs also found mushrooms deep in the forest, because they can nearly 220 million scent discrimination. Dog brain is developing. Dogs first distinguish objects based on motion then to light and ultimately shape. So our vision is poor, only saw 2 black-white. We have seen in the winter cold, occasional dog or take cover nose wet tail, that's how we keep her warm. Dogs have 2 coats: outer layers as we have seen, even the inner lining helps them stay warm and dry in cold rainy days, even tasked to "cool" in the hot day .
It was calculated that: 1 year old dog corresponding to the 16. Dogs 2 years respectively with 24, 3-year-old dog - man 30, and then one additional year of age by 4 year old dog person. Today, the demand for breeding dogs are being developed so small dogs like Chihuahuas Fox, or smart as Collie dog is more interested players. This also is not difficult to understand because the dog is a faithful animal, close to the people. Dogs help people so much as look houses, hunt, and was considered loyal animals, human affection.
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