Page 224 - Health, Population and Environment Education 9

ii. Animal sources
Lever, egg, fish, cheese, curd, ghee, butter, etc.

Fig: 3
Cheese Rice Wheat

Functions of carbohydrates
a. To provide energy to the body
b. To keep the body warm
c. Helps in the growth and development of the body

d. Repair and maintain the worn out cells
e. Accelerates the rate of metabolism
f. Helps in the secretion of enzymes and hormones to prevent the body against diseases

g. Helps to maintain balance between acid and base in the body
h. Helps in the stimulation of useful bacteria (probiotics) that helps to break down the
food

i. Helps to spare protein and acts as the source of fats

B. Proteins
Proteins are essential for the survival of all living organisms. They are the essential
nutrients for the human body. They are one of the building blocks of body tissues and also
can serve as a fuel source. As a fuel, proteins provide as much energy as carbohydrates.
Protein was detected by Gerald Mulder in 1838 AD for the first time. Animals’ body
contain approximately 20% of protein. Protein play a vital role in the function of body.
Proteins are composed of oxygen, hydrogen nitrogen, carbon, phosphorus, sulphur, etc.

Fig: 4
Egg Meat Fish Milk Pulses

224 GREEN Environment Population and Health Education Book-9