9/26/2023 0 Comments Happy friday animalsMost living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The scientific study of animals is known as zoology. They have complex interactions with each other and their environments, forming intricate food webs. Animals range in length from 8.5 micrometres (0.00033 in) to 33.6 metres (110 ft). Over 1.5 million living animal species have been described-of which around 1 million are insects-but it has been estimated there are over 7 million animal species in total. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Animals (also called Metazoa) are multicellular, eukaryotic organisms in the biological kingdom Animalia.
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