Animalia
Chordata
Placozoan
Artropod
Characteristics
Essentially, animals are many-celled heterotrophic organisms. Plants
and algae characteristically manufacture their food from inorganic
substances (usually by photosynthesis). Animals must secure food
already organized into organic substances. Animals (as well as plants)
provide carbon dioxide through respiration and the decomposition of
their dead bodies. In addition, most animals have specialized means of
locomotion, generally involving muscle cells, and possess nervous
systems and sense organs–all adaptations for securing food. In most
forms there is a distinct canal or digestive system. Animal cells do not
have cell walls. Almost all animals, unlike most plants, possess a
limited amount of growth; that is, the adults of a given species are
nearly identical in their characteristic form and are similar in maximum
size.
Social roles of cows
• Cows give humans beef, milk, leather and
cheese.
• Cows affect the environment by eating to
much vegetation, polluting the water, and
they cause more erosion.
• Cows are used for working and pulling
things.
Bibliography
• http://education.yahoo.com/reference/ency
clopedia/entry/animal
• www.teachnet.ie
• www.awsomeflorida.com
• www.marinebio.org
Presented by
• Trinity And Kailey
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