What is digestion?

What is digestion?
The process of breaking down complex food substances into simple molecules is called as digestion...

What does the human digestive tract consists of?

What does the human digestive tract consists of?
Digestive system in human beings consists of alimentary canal and digestive glands. Alimentary canal is made up of mouth, buccal cavity, pharynx, oesophagus, stomach, intestine, rectum and anus. The digestive...

How do plants obtain nitrogen?

How do plants obtain nitrogen?
Nitrogen is an essential element used in the synthesis of proteins and other compounds. This is taken up in the form of inorganic nitrates or nitrites. Or it is taken up as organic compounds which have been prepared by bacteria...

What is the role of stomach in digestion?

What is the role of stomach in digestion?
The stomach is divided into three compartments namely cardiac, fundus and pylorus.  The junction of oesophagus and stomach is guarded by valve which does not allow the food to travel in backward direction. • In the...

What is the function of the small intestine?

What is the function of the small intestine?
The three main categories of nutrients that undergo digestion within the small intestine are proteins, lipids (fats) and carbohydrates. The small intestine is divided into duodenum, ileum and jejunum. The...

How do plants obtain nitrogen?

How do plants obtain nitrogen?
Nitrogen is an essential element used in the synthesis of proteins and other compounds. This is taken up in the form of inorganic nitrates or nitrites. Or it is taken up as organic compounds which have been prepared by bacteria...

What is meant by photosynthesis?

What is meant by photosynthesis?
It is the process by which autotrophs (green plants) make their own food from carbon dioxide and water which is converted into carbohydrates in the presence of sunlight and chlorophyll. During this process, oxygen gas is...

What are the two types of heterotrophic nutrition?

What are the two types of heterotrophic nutrition?
Heterotrophic nutrition can be further divided into two types, viz. saprophytic nutrition and holozoic nutrition. Saprophytic Nutrition: In saprophytic nutrition, the organism secretes the digestive juices on the food....

What are the types of nutrition?

What are the types of nutrition?
Types of Nutrition: Autotrophic Nutrition: The mode of nutrition in which an organism prepares its own food is called autotrophic nutrition. Green plants and blue-green algae follow the autotrophic mode of nutrition. Heterotrophic...

What are nutrients?

What are nutrients?
Nutrients: Materials which provide nutrition to organisms are called nutrients. Carbohydrates, proteins and fats are the main nutrients and are called macronutrients. Minerals and vitamins are required in small amounts...

What is meant by life processes?

What is meant by life processes?
Various functions carried out by living beings; which are necessary to maintain and continue life are called life process. Following are the life processes in living beings: • Nutrition • Respiration • Transportation...

What is the need for nutrition?

What is the need for nutrition?
Organisms need energy to perform various activities. The energy is supplied by the nutrients. Organisms need various raw materials for growth and repair. These raw materials are provided by nutrients....

What is meant by nutrition?

What is meant by nutrition?
Nutrition is the process by which an organism obtains the food from its environment and utilizes it for various life processes like growth, replacement of tissues, energy etc....