The kidney has a bean-shaped structure, each kidney has a convex and concave surface.

The cardiac sounds typically described as lub-dub are caused by the closing of the cardiac valves. The first sound (lub) is caused by the closing of the mitral and tricuspid valves and the second dub is caused by the closing of the aortic and pulmonic valves.

Onam is the colorful harvest festival of Kerala. People wear new cloths. There are feats and games.They also enjoy race of snake boats. People decorate their houses.

Weaving is a method of fabric production in which two different sets of yarns or threads are interlaced at right angles to form a fabric or cloth

The sun's energy is the primary source of energy for all surface phenomena and life on Earth. Combined with the material of the Earth, this energy provides for the immense diversity of life forms that are found on the Earth.

Heart beat is the average number of heart beats per minute, a heart beat is when the heart contracts to pump blood through your system.  It is approximate 70 - 72 times per minute.

Gandhi Jayanti is celebrated as Mahatma Gandhi birthday on 2nd October. Mahatma Gandhi is also known as the Father of Nation. Under his leadership India became free country. 

Both Christmas and National Festivals are celebrated on a fixed date every year.

Caravan is a mobile home is built on wheels and then taken to the place where it will be occupied. It is permanently attached with wheels and tires.

The Sarus Crane is a large non-migratory crane found in parts of the Indian Subcontinent, Southeast Asia and Australia. The tallest of the flying birds, standing at a height of up to 1.8 m.The Sarus Crane is easily distinguished from other cranes in the region by the overall grey colour and the contrasting red head and upper neck

Dam is a barrier constructed to hold back water and raise its level, the resulting reservoir being used in the generation of electricity.

The banana plant is the largest herbaceous flowering plant. All the above-ground parts of a banana plant grow from a structure usually called a corm. Plants are normally tall and fairly sturdy, and are often mistaken for trees, but what appears to be a trunk is actually a false stem, because the stem does not contain true woody tissue.

Cactus live in habitats subject to at least some drought. Many live in extremely dry environment.They reduced their leaves to spines.In the absence of leaves, enlarged stems carry out photosynthesis.They can erect them selves and need very less amount of water to grow.

A shadow is made when an object blocks light. The object must be opaque or translucent to make a shadow. A transparent object has no shadow, as light   passes  straight through it.

A caterpillar spins a cocoon made of either silk or some other similar fibrous material that is then spun around the the insect during their pupal stage. Pupal stage is the life stage of a silk worm insect.