The Human Body in the Larger World: Energy and Raw Materials
- Organisms dependent on the environment
- Ecology = the study of interactions between organisms and their environments
o Abiotic elements = sky, water, atmosphere, etc.
o Biotic elements = animals, plants, etc.
- Understanding ecological interactions is important because:
o Need to add new molecules to body as old ones get used up, depleted
Raw materials that make up the body (carbon, hydrogen, etc.)
Energy to drive metabolism of incoming food
o The new materials come from the environment
Raw physical materials from other animals, the atmosphere, the Earth
Energy from sunlight and chemical reactions
- Organisms get important biological macromolecules through food
Category Subunits Macromolecule Example