EXCRETION IN DIFFERENT ANIMALS

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Presentation transcript:

EXCRETION IN DIFFERENT ANIMALS UNIT 2 The nutrition function Natural Science 2. Secondary Education EXCRETION IN DIFFERENT ANIMALS

Excretion in different animals UNIT 2 Excretion in different animals EXCRETION ANIMALS WITH NO SPECIALISED PARTS FOR EXCRETION ANIMALS WITH SPECIALISED PARTS FOR EXCRETION RESPIRATORY ORGANS EXCRETORY ORGANS Click on each box to find out more Natural Science 2. Secondary Education

Go back to the Start menu UNIT 2 Excretion in different animals Animals with no specialised parts for excretion Sponges and cnidarians eliminate waste through their body surface because most of their cells are in direct contact with the external environment. A cnidarian (anenome) with no excretory system. Go back to the Start menu Natural Science 2. Secondary Education

Go back to the Start menu UNIT 2 Excretion in different animals Animals with specialised parts for excretion Excretion is carried out by: The respiratory organs The excretory organs Malpighian tubules The respiratory system in a mammal The excretory systemin an arthropod (Malpighian tubules) Go back to the Start menu Natural Science 2. Secondary Education

Go back to the Start menu UNIT 2 Excretion in different animals Excretion in respiratory organs Respiratory organs play a role in excretion by expelling carbon dioxide from breathing. CO2 The respiratory organs of an arthropod (tracheae) Go back to the Start menu Natural Science 2. Secondary Education

Go back to the Start menu UNIT 2 Excretion in different animals Excretion in excretory organs Excretory organs filter the circulating liquid, collecting the waste matter it carries. Later they eliminate this waste directly into the environment or they discharge it at the end of the digestive system, so it is eliminated along with indigestible food. Examples of excretory organs: Kidneys (vertebrates) Malpighian tubules (insects and myriapods) Nephridia (many invertebrates) Antennae glands or maxillary glands (crustaceans) The kidneys of a reptile Go back to the Start menu Natural Science 2. Secondary Education

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