What Are The Key Characteristics Of Animal Kingdom?

Animal Kingdom

Animals are eukaryotic, multicellular, species belonging to the Kingdom Animalia. Every animal has its ain unique characteristics. They obtain their energy either by feeding on plants or on other animals. At that place are millions of species which have been identified, few share similar characteristics while others differ drastically.

Also Read:Lower Invertebrates

Classification of Animal Kingdom

Animals are classified based on their characteristics. They are eminent from algae, plants, and fungus where rigid cell walls are absent. Some are also heterotrophic, in general, they digest their food inside the internal chambers which again distinguish them from algae and plants. Another elite character of these species is that they are motile, except in certain life stages.

Protozoa

Protozoa are the unlike group of eukaryotic organisms which are unicellular having some similar characteristics of animals such as motion and predation. Protozoa take in nutrient by the process of osmotrophy that is by engrossing the nutrients through the jail cell membranes or as well they feed on phagocytosis, either by the process of engulfing the particles of the food with the help of pseudopodia.

Bryozoans

Bryozoans are unremarkably acknowledged equally moss animals. They are filter feeders which sift nutrient particles out of the water using a crown of tentacles lined with cilia and most of them dwell in humid waters, few in glacial waters and some in marine trenches. Most of them are colonial and one genre is solitary. Zooids are individuals in bryozoans and they are not completely independent species. All colonies have motorcar zooids, which are accountable for feeding and excretion.

Vertebrates

Vertebrates are the animals possessing backbones. Some include jawed vertebrates and jawless fish. For example sharks, ray fish, and bony fish. A bony fish named clad also further falls into the class of amphibians, reptiles, mammals, and birds. Extant vertebrates vary in size beginning from the frog species named Paedophryne amanuensis to the blue whale. Amphibians are species that live in the land and motion to water for breeding. Reptiles are covered by scutes. Mammals are terrestrial, aquatic or aerial. Birds are covered with feathers and accept streamlined avenues.

Organ Level of Organization: Animal tissues comprising of similar capacity are classified into shaped organs. Every organ is definite for item capacity. For case Platyhelminthes.

Tissue Level of Organization: Animate being cells displaying division of exercises among themselves.Cells performing the same role cooperate to grade tissues.

Organ framework Level of Organization: The organ framework level of organization are displayed in those organisms where organs define the shape of functional frameworks and each framework is with a distinct physiological capacity.

Cellular Level of Organization: This organization consists of animals with cells which are formed as free cell lumps.

Organ Systems Patterns

Circulatory System: They are 2 types of the Circulatory framework – open type and closed type.

Open Type: In this type of circulatory organization the blood is pumped out of the heart. For example Mollusca and Arthropods.
Closed Type: In this type of circulatory system the blood flows through a progression of vessels that is capillaries, arteries, and veins.

Digestive System: There are 2 types of digestive organization. Consummate and Incomplete digestive systems.

Complete Digestive System: In this type of digestive arrangement at that place are two openings to the outside of the trunk, a rear-end and a oral fissure. For instance: Chordates and Arthropods.
Incomplete Digestive Arrangement: Information technology consists of only one open to the outside of the trunk a solitary opening which serves every bit both rear-finish and oral cavity. For example Platyhelminthes.

Torso Symmetry:In that location are three types of symmetry. Bilateral, Radial, and Asymmetrical.

Bilateral Symmetry: Animals, where a trunk tin can be partitioned into indistinguishable left and right parts, are known to be bilaterally symmetrical.
Radial Symmetry: Animals tend to brandish screw symmetry. For example Coelenterates, Echinoderms, and Ctenophores.
Asymmetrical: Asymmetry is the finished nonappearance of symmetry. That is a few animals cannot exist divided into two equivalent parts forth with any aeroplane going through the focal point of the organism. For example Sponges.

Also Read:Kingdom Plantae, Animalia, Viruses

Stay tuned with BYJU'S to learn more virtually the Fauna Kingdom and its nomenclature.

Source: https://byjus.com/biology/animal-kingdom/

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