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A-Level Biology OCR A

System Body Organ State Examples Animals Describe Funciton

Three organ systems are the digestive system (food processing and absorption), cardiovascular system (blood transport), and gaseous exchange system (gas exchange).

Three organ systems in animals are the digestive system (food intake, nutrient absorption, waste removal), cardiovascular system (blood transport), and gaseous exchange system (oxygen intake, carbon dioxide expulsion).

Front State 3 examples of organ systems in animals and for each describe their funciton.
Back Animal organ systems:
  • Digestive system - takes in food, breaks down large insoluble molecules into small soluble ones, absorbs nutrients into the blood, retains water needed by body and removes undigested material from body
  • Cardiovascular system - moves blood around the body to provide a transport system for the substance it carries
  • Gaseous exchange system - brings are into the body so O can be extracted for respiration and CO2 can be expelled

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