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Animals (Animal Nutrition (Animal Diet (Essential Nutrient (substances…

- - - - food processing begins
        
        teeth start munching down on food into smaller pieces
    - - saliva helps break down nutrients
    - - protease
      - pepsinogen
      - pepsin
  - - - structure in mammals mouth and teeth help us have a bigger or smaller variety in food options
  - - - Begins the food process and is the act of eating or feeding
    - - Second stage of food processing. Food is broken down into molecules small enough for the body to absorb
    - - process completed unnecessary nutrients exit
  - - - substances that an animal require but cannot assemble from simple organic molecules
    - - amino acids obtained from the animals food in prefabricated form
    - - Obtained from the diet
    - - Inorganic nutrients such as iron and sulfur
- - - - the maintenance of internal balance
    - - A control mechanism that "damps" the stimulus
    - - mechanism that amplifies the stimulus
    - - set of physiological changes that occur roughly every 24 hours
    - - physiological adjustment to changes in its external environment
  - - - process by which animals maintain their body temperature within a normal range
    - - Endotherms obtain heat from their internal metabolism
    - - Ectotherms adjust their body temperature by behavioral means. Example: seeking out of shade or basking in the sun
  - - - Ex. Water is denser than air and bumps on animal body surface can be no benefical
    - - The space between cells are filled with fluid
    - - Respiratory, Excretory, Digestive, Circulatory system
  - - - Determines nutritional needs and is related to the animal's size, activity and environment
    - - Use light energy to build energy rich molecules
    - - Obtain energy from eating food with organic molecules