Fill in the blanks:

(a) Taking stimulants and …………… are unhealthy habits.

(b) Physical exercise should be …………… and regular.

(c) Public drains and garbage must be covered with …………… powder or lime.

(d) …………… is often designated as public enemy no. 1.

(e) …………… is a parasite which lives on rat's skin.

Name the following :

(a) The bacterium which causes cholera.

(b) The liquid domestic wastes from the kitchen, toilet, etc.

(c) The chemical substances used to kill rats.

(d) The disease caused due to the inflammation of liver.

(e) The disease caused due to the bacilli bacteria released in tannery wastes from leather industries.

Define:

(a) Health

(b) Hygiene

(c) Pathogen/germ

(d) Vector

(e) Contamination

Give suitable explanations for the following:

(i) One should breathe by nose and never by mouth.

(ii) Hands must be washed before eating food.

(iii) Eating places must be kept free of flies.