In northern Canade and the C.I.S. there are vast belts of forests called ‘Coniferous forests’. In the summer months, as the snow melts, ample food for many varieties of birds and animals is available and the otherwise cold forests are sudde…
Human Reproductive System Life on our planet has evolved, developed and continued because all creatures have some system which allows them to reproduce. The system of recreating life is called reproduction. Both male and female human beings have rep…
The Genitro-Urinary System Waste products from the body are regularly let out both in liquid and solid form. The system in the body which is responsible for the production of liquid waste or urine is called the Urinary system. The prime organs…
Mouth and Teeth Our mouth is an inlet in our body which allows us to eat, drink and breathe. The mouth has a hard palate at the top and the tongue at the bottom, surrounded by the teeth, and leading into the throat at the back. The tongue is a …
Heart and blood Blood cells carry nourishment to all parts of our body through a network of arteries and veins and an average adult body contains about 4.5 liters of blood. Blood is red in colour and is made up of three types of cells, i.e., Red …
Ears and Sound Our ears not only allow us to hear sounds, thus preventing the world from becoming a silent one, but also act as organs of balance. They collect sounds from the air and pass them to the brain in thick form of nerve signals. More …
Blood groups and blood pressure All blood looks red in colour but in reality its composition may be different. Blood contains red cells and on the surface of these cells are factors called antigens. Antigens are of two types, i.e., antigen ‘A’ an…
Arteries and veins The lifeline for oxygen and nutrients to the entire body consists of a complex network of tubes called arteries and veins. These deliver nutrients and oxygen to the various parts of the body and collect waste and toxic substance …
The Respiratory System Life thrived on Earth primarily because of presence of Oxygen in the air. All animals and creatures living on earth have respiratory systems of various kinds, some may have lungs, others like fish may use gills, and yet o…
The Digestive System As we bite into something we want to eat and begin to chew, we initiate the activity of our digestive system. As our teeth crush the food, a watery substance called ‘Saliva’, from our salivary glands, gets mixed into the fo…
