biological filter system

It is represented by a pair of kidneys, a pair of ureters and a urinary bladder. Kidney contain numerous units called nephrons which filter blood, remove urea and convert it into urine. It is collected in the urinary bladder through ureters (kidney ducts), temporarily stored and then peri..

Promoting the sustainable system of agriculture which encourages use of as less chemicals as possible in agricultural operation. Reduced use of fertilizers in a method called Integrated Farming System - which promotes the use of all natural resources along with fertilizers...

Respiratory System in Human Beings The respiratory system starts with the nose that encloses the nasal cavity. The nasal cavity opens to the outside through the openings called the nostrils. The nasal cavity is divided into two portions by a cartilagenous septum and is line..

Water is purified in villages using this technology. Water is passed through different containers containing sand, gravel and charcoal. Purified water is collected in the bottommost vessel. Water filter in rural homes In urban areas the same technology and can be modified and used..

In this case sewage water passes through a thick bed of gravel stones so that bacteria consume most of the organic matte..

The transport system in animals is called the circulatory system. The materials are transported from one part of the body to another by a mass flow system which is the circulatory system. The animals, particularly the more advanced forms, have a higher metabo..

The process of supplying water to crops in the fields by means of canals, reservoirs, wells, river valley systems and river lift systems is known as irrigati..

Root System - Root is the descending portion of the axis of the plant. It is not normally green in colour. It is characterised by the absence of nodes and internodes. There are two types of root systems, the tap root system (seen in dicots) and fibrous root system..

Root is the descending portion of the axis of the plant. It is not normally green in colour. It is characterised by the absence of nodes and internodes. There are two types of root systems, the tap root system (seen in dicots) and fibrous root system (seen in monocots)..

Frog, being a typical vertebrate, shows the presence of a skeletal system that forms the internal supporting framework for the body. It can be distinguished into an axial skeleton and an appendicular skeleton. Axial skeleton consists of skull, vertebrae and sternum. Appendicular skeleton ..