| Term | Definition |
|---|---|
| Responsiveness | Ability of organism to sense, monitor and respond to changes in both its external and internal environments |
| Conductivity | Capacity of living cells to transmit a wave of electrical disturbance from one point to another within the body |
| Growth | Organized increase in the size and number of cells and therefore and increase in size of the individual or a particular organ or part |
| Respiration | Exchange of respiratory gases (O2 & CO2) |
| Digestion | Process by which complex food products are broken down into simpler substances that can be absorbed and used by individual cells |
| Absorption | Movement of molecules such as respiratory gases or digested nutrients through a membrane and into the body fluids for transport to cell for use |
| Secretion | Production and release of important substances such as digestive juices and hormones for diverse body functions |
| Excretion | Removal of body waste |
| Circulation | Movement of body fluids containing many substances from one body area to another in a continuous circular route through hollow vessels |
| Reproduction | Formation of new individual offspring |
