Across
- 4. The process of introduction of weakened germs into the body to develop resistance against a particular disease
- 8. The front four teeth in the center of each jaw.
Down
- 1. The science of establishment and maintenance of health is known as ______.
- 2. The innermost space of the tooth.
- 3. The help given to people during emergencies before the arrival of the doctor.
- 5. Food changes into a ball like mass called _____.
- 6. Disordered state of body is called _____.
- 7. The mineral found in common salt, milk and fruit.