- Immunization- vaccines given to prevent certain diseases
- Interdependence- a state in which there are mutual, shared or reciprocal needs.
- Lymphocytes- a type of white blood cell.
- Macrophage- a type of white blood cell.
- Metabolism- a chemical process in the body constantly taking place that uses and releases energy.
- Chromosomes- 46 thread-like structures that contain genes and DNA.
- Neuron- a nerve cell.