Life process-Nutrition {biology}
When we do any work, we require energy to do.Energy is needed to maintain a state of order in our body . We also need materials from outside in order to grow, develop,synthesis protein and other substances needed in the body. These requirements are fulfilled by food that we eat. How do living things get their food? The general requirement for energy and materials is common in all living beings but is fulfilled in different ways.Some organisms use simple food materials obtained from inorganic sources in the form of carbon dioxide and water. These organisms are known as autotrophs include green plants and some bacteria. Other organisms utilise complex substances. these complex substances have to be broken down into simpler substances. These organisms are known as heterotrophs included animals and fungi. Nutrition in human beings -The alimentary canal is basically a long tube extending from the mouth to the anus.In our body various regions are specified to perform different fun...