quarta-feira, 4 de novembro de 2009
* Mammals (Latin scientific Mammalia) are a class of vertebrate animals characterized by the presence of mammary glands in females which produce milk to feed the youngers , and the presence of fur or hair. Animals are homeothermic (ie, constant temperature, also known as "warm-blooded animals").
* The brain controls the body temperature and circulatory system, including the heart (four chambers). Mammals include 5416 species (including humans), distributed in about 1,200 genera, 152 families and 46 orders, according to the compendium published by Wilson and Reeder (2005). However new species are discovered each year, increasing that number, and by the end of 2007, the number reached 5558 species of mammals.
* The mammals are the actual descendants of synapsids, the first well-established group of amniotes that arose in the Upper Carboniferous.
* They are a class of vertebrate animals, bipedal, warm-blooded, oviparous, mainly characterized by having penas.As birds vary greatly in size, from tiny hummingbirds to large species such as ostrich and emu.
* Note that all birds are birds, but not all birds are birds.
* The birds are included in the order Passeriformes, being the richest order, ie with the highest number of species within the group of birds.
* These animals, mostly lay eggs and these are hatched by the heat of the sun
* However, there are some types of lizards and snakes that have put their young graduates.
* In Brazil, there is an important work of preservation of a reptile species that nearly went extinct. In partnership with IBAMA, Fundação Pró-Tamar makes the monitoring of a thousand miles of beach, following the birth of reproductive development of sea turtles. The Tamar is recognized worldwide as an example of working towards the preservation of this species.
* This class of vertebrate animals consists of frogs, toads, salamanders and caecilians water, it was the first to appear on planet Earth around 300 million years.
* There are still rare and ancient species that lived in the Coal Age, a period in which these animals were the dominant group.
* The word amphibian comes from the Greek and its meaning "two lives". An example is the frog that was born as tadpoles, surviving only in the water, but, as an adult, it loses its tail and becomes a Anura, order of frogs, toads and frogs. This term is quite old and refers to the main frogs, toads and frogs (hence the name).
* About 4000 species belong to the group of modern vertebrates, and its three main categories: the Caudata, Anura, or Gmnofiona apoda, are those that have the form of worm.
* Amphibians have the ability to live both inside and outside the water, however, your skin needs to be constantly moist, it functions as a means of breathing for this animal.
* Nowadays, there are more than 28 million species cataloged
* Fish have a vision of short, though fantastically blind in all directions. They can not hear very well, but have sensitive parts of the body that allow them to realize what is happening nearby. The blood of the fish, unlike ours, is cold.
* Playback happens to fish spawning. The female lays eggs in large quantities. These eggs are grouped together to form a kind of gelatin. They are abandoned and, if not eaten by other fish, will develop themselves.
*F ish-electric can produce electric current through special muscles that have the body. Most people produce an electric current of low power, however, there are species that the electricity generated can affect a man. There are approximately twenty species of electric fish in the world.