Animals (also called Metazoa) are multicellular eukaryotic organisms that form the biological kingdom Animalia . With few exceptions, animals consume organic material, breathe oxygen , are able to move , can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development . Animals range in length from 8.5 micrometres (0.00033 in) to 33.6 metres (110 ft). They have complex interactions with each other and their environments, forming intricate food webs . The scientific study of animals is known as zoology.
Animals are of different sizes and shapes, like when we talk about biggest animal, most of our minds will be going towards the Elephant, Lions, Hippos and so on, you're not wrong actually but let me let you in on the Most Heavy Animal in the world.
The blue whale is a marine mammal belonging to the baleen whale suborder Mysticeti. Reaching a maximum confirmed length of 29.9 metres and a weight of 173 tonnes, it is the largest animal known to have existed. It is also the loudest animal on Earth;even louder than a jet engine -- its calls reach 188 decibels while a jet reaches 140 decibels. It's baby weighs about 4000kg at Birth,while an adult weighs as much as 150,000Kg.Its heart is compared with the weight of a small car.
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