| A | B |
|---|
| metabolism | all the chemical reactions that occur within the cells of an organism |
| mitochondria | pod-shaped organelles that contain enzymes used to extract energy from nutrients; power plant of cell |
| nucleus | structure within a cell that controls the cell's metabolism and stores genetic information(chromosomes & DNA); the brain of the cell |
| organ | a body structure made of different kinds of tissues combined to perform a specific function |
| organ system | several organs that work together to perform a major function in the body |
| organelle | a structure within the cell that carries out a specific function |
| organic | term used to describe molecules that contain both hydrogen and carbon |
| receptor molecule | certain protein molecules in the cell membrane that can receive chemical messages from other cells |
