How human beings came on earth?
Origin and evolution of man: Man is a mammals and supreme among all other animals which exist today. Central Asia is the place of origin […]
Differences between frog and toad
S.N. Frog Toad 1. Frog lives in or near water resources. Toad lives in dark, shady place in grass or under stones and leaves. 2. […]
Newton’s laws of motion
Sir Isaac Newton (1642-1727): Sir Isaac Newton, an English scientist, enunciated the basic laws of motion. He was born at Woolsthrope, Lincolnshire, England on the […]
Discovery of X-rays, electrons and the first liquid-fuelled rocket
Discovery of X-rays: German physicist Wilhelm Rontgen discovered X-rays in 1895 while he was investigating cathode rays (electrical discharges inside a tube containing very little […]
Some salient features of class Mammalia
Natural history: Mammals are primarily terrestrial vertebrates but few like whales and dolphins are aquatic. They are the most dominant animals on earth and have […]
Characteristic features of class Amphibia
Natural history: The amphibians (the vertebrates with dual life) were the first vertebrates to invade land, but they aren’t fully dependent to terrestrial life. They […]
Structure and functions of bones
Gross anatomy of a typical long bone: Bone is a specialized connective tissue that has the strength of a cast iron and the lightness of […]
The appendicular skeleton of human body
Appendicular skeleton is composed of bones which lie on the lateral sides of the mid axial line (Axial skeleton) of our body and consists of […]
The axial skeleton of human body
The human skeleton has two major divisions; the axial skeleton and the appendicular skeleton. The axial skeleton forms the median longitudinal axis of the body […]
The gonads and other endocrine glands in human body
Gonads: Gonads are the organs that produce gametes. One pair of ovaries (in females) and a pair of testes (in males) are the gonads that […]