animal world around us, is very diverse.Flying, crawling, swimming, walking and running around, "Every creature on the pair," as the Bible says.And how many of these "creatures", and what are the animals that live on land, in air and water, please read this article.
science of classifying animals
There is a science, systematizing all the inhabitants of the biosphere.It is called taxonomy, and determines which animals are.Science is able to find out the degree of relationship between organisms, which may not always be due to external similarity.It happens that dissimilar animals belong to different orders, while the others (for example, armadillos, anteaters, sloths) are combined into one unit.Determination of relationship of various creatures depends on the origin and on the paleontological and genetic research.
What are the classes of animals?
All life on Earth is divided into five major kingdoms.The world is populated by bacteria, protozoa, fungi, plants and animals (multicellular creatures to move about, feed on plants or other animals).The animal kingdom is divided, respectively, for 10 types, including the most advanced - chordates (they have available the primary skeletal axis).The most highly developed - vertebrates that have a backbone, converted from the chord.
What are the animals?
types, in turn, are divided into classes.In vertebrates, there are five classes of fish, amphibians, reptiles, birds and mammals.The latter has the highest organization of all vertebrates.There are two subclasses of these animals: oviparous and viviparous.The first lay eggs like birds, for example, but their children are fed with milk.The second (and marsupials and placental) give birth or aborted babies, which are then located in a special mother's pouch, or give birth to babies already formed.
find out what are the animals you can, and in more detail.The subclasses are divided into squads, squads - for delivery and childbirth - on the species.Today our planet is home to four thousand mammals.And each animal individually called special.
concept of the food chain
clarify further what are the animals?Herbivores, omnivores, carnivores.Green plants themselves provide food using photosynthesis, converting air, water, solar energy into complex compounds.Animals also do not know how to do.They have to eat plants or similar.Since forming the food chain.
Herbivorous
Most of the currently existing species feed on plant food.They use some of the plants and varieties best suited for the digestive system of the body.Everyone has their own preferences: the leaves and stems, roots and bark.Much of this can be hard to digest, but the process had herbivores help protozoa and bacteria that live in the stomach.In each class, the type, the detachment has its herbivores.This and insects: beetles, bees, butterflies, grasshoppers and fish: for example, representatives of the bone, and reptiles: turtles, and birds: passerines, chicken.In the class of mammals are herbivorous marsupials, even-toed ungulates, solipeds, rodents, lagomorphs, proboscidians.Some whales also prefer phytoplankton.In the food chain of animals like organisms called second level (trophic).
Omnivore
continue to find out what are the animals?Omnivore - is the next type, which we will consider.Interestingly, many of the organisms that feed mostly plants, sometimes not averse to treat ourselves and meat.A carnivorous and sometimes not averse to try something vegetarian.Such animals are called omnivores.As an example, some insects (cockroaches, etc.), ostriches, rats, pigs, most bears, apes (chimpanzee, etc.).This also applies to people.
Interestingly, the digestive system is not as omnivorous narrowly specialized.Therefore, their stomachs can digest and vegetable and animal food.At omnivorous mammals and no fangs, like predators, and in front of the mouth placed incisors.
