http://dl.dropbox.com/u/88381693/vertebrate_animals/vertebrate_animals.html

Mammals have the following featuresThey have their bodies covered with hairHis limbs are usually shaped legs, allowing them to move. Aquatic mammals such as dolphins or whales have fins transformed into limbs and flying mammals like the bat in their membranes possess forelimbs that serve as wingsYour body temperature is constant, ie the body temperature does not change if you change the outside temperature. We say they are warm-blooded animals.They breathe with lungs, allowing them to take oxygen from the air. Aquatic mammals such as dolphins, need to take to the sea surface to take oxygen.His mouth has lips and teeth. Let lips sucking at the breast milk without causing damage. Some whales have no teeth, but some thin slices called barbs.


PoultryBirds have these characteristics:His body is covered with feathers.Their front legs are shaped like wings. Birds fly through the movements of their wings, though some birds can not fly, like ostriches or penguins.The skeleton is very light, since the bones are hollow. In addition, some birds have pouches called air sacs, which are filled with air and facilitate flight.Body temperature is constant, ie, they are warm-blooded animals.They breathe with lungs.The mouth has a toothless beak, which varies greatly from species to species as food.


Fish have the following characteristics:His body is covered with scales.His limbs are shaped fins. Your body ends in a stronger fin forming the tail.Its skeleton is the simplest of vertebrates. Most fish have bony skeleton, bones shaped spine. Some fish, like sharks and rays, have a cartilaginous skeleton, consisting of pieces soft and flexible bones called cartilage.Body temperature is variable, ie, depends on the temperature of water in which they are found. So we say they are cold blooded animals.Most fish have a swim bladder, which is like a bag full of air that prevents them from sinking.Fish breathe through gills, which are a group of thin plates arranged in several rows. The gills are located behind the head, and allow them to get the oxygen dissolved in water.


Amphibians have the following characteristics:Their skin is naked and wet.His limbs are muscular legs, allowing them to swim or jump.Body temperature is variable, ie, they are cold blooded animals.The young are born in water and breathe through gills, while the adults live on land and water, and breathe through their skin and lungs.They feed on insects, worms and other small animals.They are oviparous: they reproduce by eggs. Fertilization is usually external. The female lays eggs in water and the male fertilizes them, water the eggs stick together and form clusters bulky.Reptiles possess these characteristics:His body is covered with scales.His limbs are shaped legs, which are usually very short. Some reptiles, like snakes, have no legs.Your body temperature varies, ie, they are cold blooded animals. Therefore usually live in hot, and become dormant during winter.They breathe with lungs.Most are carnivores. In the mouth often have many teeth, all the same size, with those who hold their prey.They are oviparous, ie, reproduce by eggs.Their fertilization is internal. The male mates with the female and fertilized eggs are formed. the female lays eggs on the grass or buried.Some reptiles, like the snake are ovoviviparous: The eggs hatch within the body of the mother and pups are born alive.


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Features
Vertebrates have bilateral symmetry and are provided with a skull protects the brain, and skeletal cartilage or bone, which comprises a metamerizada axial (spine). The authors know each and almost 62.0001 50.0003 extant species.
The typical vertebrate body are clearly divided into three regions: head, trunk and tail, the trunk is in turn subdivided into thorax and abdomen. Protruding from the trunk limbs, which are odd in pairs in lampreys and other vertebrates. Notochord present in the embryo stage, which is replaced by the spine in the adult, the head is distinct, and shall gather and centralize the majority of sense organs and nervous. The cranial structure of fossilized vertebrates with ease, which has been fundamental for the evolution.
During embryonic development, the walls of the vertebrate body develop holes or gill slits, resulting in the gills (in fish) and different structures. The skeleton can be bone, cartilage, and sometimes present dermoesqueleto, consisting of a skeletal skin formations.

 The vertebrates are classified into five groups:
     mammals
     poultry
     fish
     amphibians
     reptiles

ANIMAL FOOD
 
We classified the animals into two groups according to a backbone or not. But there is much to observe in making differences between animals.
The way you eat, what they eat allows us to classify them into:
Herbivores that eat grass.
Carnivores: those who eat meat.
Omnivorous eaters all, grass and meat.
Animals need food to grow and replenish the energy expenditure involved in any activity.
The body needs food to grow and it is "gasoline" for any activity (travel, hunt, chew, ...).
According to the food consumed establishing relationships and these relationships power is what is called a food chain.
The lion eats zebras and zebras eat grass.
The Iberian lynx eat rabbits and rabbits eat plants.
The imperial eagle eat partridges and quail eat wheat.
The koala eats eucalyptus leaves.
If an item disappears chain may result in the survival of some species may be endangered.

     
                              

Animals
Animals like all living things are born, grow, feed, reproduce and die.
They differ from plants in which travel and feeding on plants, animals or both.
Animals can be classified in many ways depending on: the type of food they eat, how to play or where they live.

                       



Vertebrates are a group of animals with an articulated internal skeleton, which acts as support of the body and allows their movement.
Have the following characteristics:
Have a spine, consists of a series of articulated parts or vertebrae, which allow some movement and give them some flexibility.
The body is divided into head, trunk and extremities.
There are individual males and individual females, ie, sex is differentiated.