Animal Kingdom

The diverse environment around us is nothing short of a marvel, with millions of biotic and abiotic components that make up our ecosystem. The biotic community, or living community, can be further divided into two basic categories: plants and animals. We'll look at the kingdom Animalia and the numerous phyla that it contains, as well as their distinguishing characteristics, in this topic.

Animals are multicellular, eukaryotic life forms that eat heterotrophically and live in a variety of ecosystems, including terrestrial, freshwater, and marine environments. They can be divided into two groups based on whether or not they have notochords: chordates and invertebrates. Chordates make up only 5% of the animal kingdom, with invertebrates accounting for the majority of the rest. The existence of a vertebral column or backbone distinguishes vertebrates from chordates as a subphylum. All animal cells, with the exception of sponges, are organized into tissues, which in turn organize into well-defined organs and organ systems for carrying out critical biological functions. In nature, most creatures are diploid and reproduce sexually through the creation of gametes.

Classification of Animal Kingdom

Characteristics of animals are used to classify them. They're found in algae, plants, and fungi that don't have rigid cell walls. Some are also heterotrophic, meaning they digest their food within internal chambers, which sets them apart from algae and plants. These species, with the exception of certain life stages have another distinguishing feature: they are motile.

Protozoa

Protozoa are a type of eukaryotic organism that is unicellular and has certain animal-like features like movement and predation. Protozoa eat through osmotrophy, which involves absorbing nutrients through cell membranes, or phagocytosis, which involves engulfing food particles with the help of pseudopodia.

Bryozoans

Bryozoans are typically thought of as moss animals. They are filter feeders that use a crown of tentacles laced with cilia to sieve food particles out of the water. They live in humid environments, glacial waters, and marine trenches. The majority are colonial, with one genre being solitary. Individuals in bryozoans are called zooids, and they are not totally self-contained species. Auto zooids are responsible for feeding and excretion in all colonies.

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Vertebrates

Animals with backbones are known as vertebrates. Jawed vertebrates and jawless fish are among them. Sharks, ray fish, and bony fish are examples. Clad, a bony fish, is also classified as an amphibian, a reptile, a mammal, and a bird. From the frog Paedophryne amanuensis to the blue whale, the size of existing vertebrates varies. Amphibians are land-based organisms that migrate to water to reproduce. Scutes coat the skin of reptiles. Mammals can be found on land, in water, or in the air. Birds have streamlined pathways and are coated with feathers.

Animal kingdom is classified into 11 phylums that are: -

• Phylum - Porifera
• Phylum - Coelenterata (Cnidaria)
• Phylum - Ctenophora
• Phylum - Platyhelminthes
• Phylum - Aschelminthes
• Phylum - Annelida
• Phylum - Arthropoda
• Phylum - Mollusca
• Phylum - Echinodermata
• Phylum - hemichordata
• Phylum - Chordata

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Organ Level of Organization: Animal tissues of similar capacity are categorized into shaped organs at the organ level of organization. Every organ is designated for a specific function. Platyhelminthes, for example.

Tissue Level of Organization: Animal cells demonstrate active division among themselves at the tissue level of organization.

Tissues are formed when cells that execute the same purpose work together.

Organ framework Level of Organization: The organ framework level of organization is seen in organisms where organs establish the shape of functional frameworks and each framework has its own physiological potential.

Cellular Level of Organization: The cellular level of organization is made up of animals with cells that are lumped together as free cells.

Organ Systems Patterns

Circulatory System: There are two types of circulatory systems: open and closed.

Open Circulatory System: The blood is pushed out of the heart in an open type circulatory system. Mollusca and arthropods, for example.

Closed Circulatory System: Blood flows via a series of vessels called capillaries, arteries, and veins in this type of circulatory system.

Digestive system: The digestive system is divided into two categories. There are two types of digestive systems: complete and incomplete.

Complete Digestive System: There are two entrances to the outside of the body in this sort of digestive system, a back-end, and a mouth. Chordates and arthropods, for example.

Incomplete Digestive System: There is only one opening to the outside of the body, which functions as both the back-end and the mouth. Platyhelminthes, for example.

There are three types of symmetry in the human body. Asymmetrical, Bilateral, and Radial

Bilateral Symmetry: Bilaterally symmetrical animals have bodies that may be divided into indistinguishable left and right portions.

Spiral Symmetry: Animals have a tendency to have spiral symmetry. Coelenterates, Echinoderms, and Ctenophores are examples.

Asymmetrical Symmetry: Asymmetry is the absence of symmetry in its final form. That is, a few animals cannot be divided into two equal portions by any plane passing through the organism's focus point. Consider the Sponges.

Animal kingdom pictures

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