Animals depend upon plants as an energy source. Chemicals in food are broken down in respiration to create energy stores that can be used by the cell.
Animal cells have a basic structure. Below the basic structure is shown in the same animal cell, on the left viewed with the light microscope, and on the right with the transmission electron microscope.
|Cytoplasm||Where enzymes and other proteins are made. Location of reactions in anaerobic respiration.|
|Nucleus||Contains DNA which carries the genetic code for making enzymes and other proteins used in chemical reactions such as photosynthesis and respiration.|
|Cell membrane||Allows gases and water to diffuse freely into and out of the cell. Controls the transport of other molecules.|
|Mitochondrion (plural is mitochondria)||Contains enzymes for the reactions in aerobic respiration (in animals, plants and yeast).|
|Ribosome||Where amino acids are joined together to make a protein.|
Most cells are specialised and are adapted for their function. Animals and plants therefore consist of many different types of cell working together.