There are over a million different species of animal have been discovered, and there millions more up to now to be discovered. Animals are living breathing organisms found in nearly all of the Earth’s habitats that include the depths of the oceans, the freezing Arctic, and even inside other plants and animals.The kingdoms were animals dwell is divided up into animals without backbones (invertebrates) such as lobsters and snails, and animals with backbones (vertebrates), such as frogs and monkeys. Invertebrates are the vast majority in the animal kingdom.
Would you like to know what an Animal is?
Animals are a composition of cells. The majority of these cells move around, and those that are fixed in one place, or sedentary, move their body parts. Animals survive by taking food into their bodies. They have sensors and nervous systems that allow them to notice what is happening about them and reply rightly.
Classification of animals
Animals are classified into groups based on their similar traits and whether they have common ancestors. There are currently 35 major groups called phyla (singular phylum). Every phylum is shared into sub-groups. The least of these is the species, which contains animals consisting of only one type.
Looking at flatworms
Worms such as these (phylum Platyhelminthes) have a dropped body with only one opening, the underside, which is where the mouth is. There are currently over eighteen thousand species including those, such as tapeworms, that are parasites of mankind and other animals within the kingdom.
They are roundworms, or simply nematodes (phylum Nematoda), have a thin, cylindrical body type that is pointed at the end on both sides. You’ll find your nematodes in many regions, and large landscapes and live in large numbers in soil. Nematodes are parasites of some animals and plants mulch.
What are sponges?
The animals perceived the most basic are sponges (phylum Porifera). There are about 5,000 species, the vast majority of which live in the sea attached to rocks and other things. The water is taken in through holes, or pores, which are found in the sponge’s body walls; their food is then filtered out and eaten by the sponge’s cells.
What are cnidarians?
Today there are nine thousand species of cnidarians (phylum Cnidaria); the majority of them dwell in the sea. They admit sea anemones, hydras and jellyfish. Cnidarians catch food for their bodies using their armed tentacles which have stinging threads, called nematocysts.
Skeletons within animal’s works as a support model that maintains the shape of an animal allows animals to move around. Most skeletons found within animals are hard structures, either inside or off the animal’s body to which muscles are attached. Animal’s body, to which muscles are attached the skeleton usually protects the animals internet organs and, in the case of an insect’s external skeleton, which stops the animal from dying out.