Give two examples of each :

1. Metabolic diseases
2. Genetic diseases
3. Allergies
4. Dietary deficiency diseases
5. Cancer

Given below is a crossword puzzle. Read the clues across and clues down, and fill up the blank squares. Check your performance with the correct solutions given at the end of the chapter.

Clues down

1. Germs or germ - substances introduced into the body to prevent occurrence of an infectious disease.

2. A disease caused by an infected dog that affects the central nervous system.

3. A disease in which the eyes, the skin and the urine turn yellow.

4. The disease pertussis is popularly known as whooping ……………

Clues across

1. Category of pathogen that causes diseases like common cold and mumps.

5. This is the vaccine for preventing tuberculosis.

6. An organ usually affected by tuberculosis.

7. Jumbled spelling of one of the most common insect which visits our exposed foods and contaminates them.

8. Cover this part of your body by a handkerchief while sneezing to prevent droplet infection to others.

9. These may readily grow in your hair, if you do not wash it regularly.

10. A disease that weakens body's defence system against infections.

Name the following:

1. A bacterial disease caused due to contaminated water.
2. A disease caused due to Plasmodium.
3. A disease caused due to the bite of female Culex mosquito.
4. A viral disease spread by the bite of a dog.
5. Two diseases caused due to the deficiency of protein in the diet of a child.
6. Any three water-borne disease.
7. Two common eye infections
8. Two stimulants harmful for human consumption
9. Two diseases that are spread via contaminated food and water
10. Two diseases caused by protozoans
11. Two communicable diseases

Write 'True' and 'False' against each of the following statements :

1. Malaria is an infectious disease.
2. Rickets is caused due to the deficiency of vitamin A.
3. Viruses carry germs from garbage and sewage.
4. Filarial germs are transmitted by the bite of female Culex mosquito.
5. Nightblindness is the disease in which people are not able to see at night even if light is available.