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Animal kingdom

Grouping of all living beings with more or less complex organs, with which they move about and feed themselves; the body of knowledge about them.
ANIMAL KINGDOM -> REINO ANIMAL
El Diccionario Visual, a new valuable resource to learn Spanish. Includes 17 all-around themes to explore, including the human body, sciences and food.

evolution of life

EVOLUTION OF LIFE

The history of the Earth is divided into geological eras characterized by the formation of minerals and the appearance of animal and plant species, and humans.
 
simple organisms and echinoderms

SIMPLE ORGANISMS AND ECHINODERMS

Living beings formed of one or more cells, some of which possess a skeleton formed of calcareous spicules.
 
insects and arachnids

INSECTS AND ARACHNIDS

Highly diversified grouping of all animal invertebrates, (over 1 million species of insects and 50,000 species of arachnids); they are more numerous than all other animal or plant species.
 
mollusks

MOLLUSKS

Land and aquatic invertebrates (more than 100,000 species) with soft nonsegmented bodies; they usually secrete a calcareous shell.
 
crustaceans

CRUSTACEANS

Usually aquatic invertebrates (over 40,000 species) whose segmented bodies have articulated appendages and often carapaces.
 
fishes

FISHES

Cold-blooded aquatic vertebrates (about 30,000 species) having motor fins and bodies that are usually covered in scales.
 
amphibians

AMPHIBIANS

Four-limbed vertebrates with soft smooth moist skin, usually found in water in the larval stage and on land in the adult stage.
 
reptiles

REPTILES

Cold-blooded vertebrates covered with scales (about 6,000 species) found mainly in warm countries; their four limbs are sometimes atrophied or absent.
 
 
insectivorous mammals

INSECTIVOROUS MAMMALS

Vertebrates (about 370 species) with four limbs and a body almost entirely covered with hairs and sometimes barbs; they feed on insects.
 
rodents and lagomorphs

RODENTS AND LAGOMORPHS

Rodents have one pair of constantly growing sharp incisors used for feeding; lagomorphs have two pairs.
 
 
 
marine mammals

MARINE MAMMALS

Carnivorous aquatic vertebrates (about 116 species) with limbs evolved into fins, skin that is smooth or covered in short hairs, and sometimes a dorsal fin.
 
primate mammals

PRIMATE MAMMALS

Vertebrates (about 200 species) with prehensile hands and feet, with five digits ending in a nail; they live mainly in trees and can stand erect.
 
flying mammal

FLYING MAMMAL

Vertebrate covered with hair, with forelimbs converted into wings by means of a membrane connecting the fingers, allowing it to fly.
 
marsupial mammals

MARSUPIAL MAMMALS

Four-legged vertebrates covered with hair; the female usually has a ventral pouch in which the embryo develops after birth.
 




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