This is to increase the surface area of the intestine for absorption of the nutrients in the food. The lining of the s…

The human scalp contains an average of about 100,000 individual hairs, each of which is approximately one-fifth of a m…

Hair develops from the cells of the hair bulb, which divide rapidly. The cells of the hair bulb move upwards as new ce…

A hair is a tube filled with cells and pigment with spaces in between. Normally, the spaces are filled with fluid and …

The human eye sees when light stimulates the sensitive cells on the retina. The retina is made up of ‘rods’ and ‘cones’…

The blind spot of the human eye is where the nerve endings of the photoreceptor cells covering the entire retina join …

It is calcium phosphate, which forms tooth enamel. Like bones, tooth enamel is made from crystals of calcium phosphate…

Oxygen at 65% is the most abundant and carbon is next at 18.5%. 96.2% of the body weight of a human comes from ‘organi…

The itch that we feel as a wound heals is caused by the growth of new cells underneath the old scab. They form a new l…

When a boy reaches puberty the production of testosterone in his body increases (just as oestrogen production increase…

People who suffer from acidity often think that the cause of their problem is something in their diet. However, it is …