Heterotrophic

All animals are

Require organic molecules.

Harvest energy by breaking bonds in food.

• Lipids are for long-term energy storage.

• Carbs are for short-term energy release.

• Proteins are necessary for the building blocks.

Animals need constant energy to organize cells, tissues, organs.

Three types of heterotrophic feeding.

• Predation
• Suspension feeding
• Symbiosis

Essential

Can't make your own

Requires to obtain via your diet

Amino Acids (8 of 20 are essential)

Organic Atoms

Fatty Acids

Nutrients

Elements

Food energy values measured by amount of heat food produces when burned in the presence of O2.

Animals burn food and give off CO2 and H2O.

Calorie

Heat to raise 1 gram of water by 1C.

1 kilocalorie = 1000 Calories

Basil Metabolic Rate BMR

The amount of O2 used per hour.