Holozoic nutrition
Encyclopedia
Holozoic nutrition is a method of nutrition
that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. This method suggests phagocytosis where the cell membrane
completely surrounds a food
particle.
Most of the free living animals including humans exhibit this type of nutrition. In this mode of nutrition, the food may be a small bacterium, a plant or an animal. Here,the food is first taken into the body through an opening called a mouth (ingestion
), then it is converted into a simple and soluble form by various enzymes (digestion
); simplified products thus formed are then absorbed (absorption); the conversion of nutrient into the fluid or solid substance of the body (Assimilation); and finally the undigested part of food is removed from the body (egestion). This type of nutrition occurs mainly in single celled organisms such as Amoeba.
Nutrition
Nutrition is the provision, to cells and organisms, of the materials necessary to support life. Many common health problems can be prevented or alleviated with a healthy diet....
that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. This method suggests phagocytosis where the cell membrane
Cell membrane
The cell membrane or plasma membrane is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. It basically protects the cell...
completely surrounds a food
Food
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals...
particle.
Most of the free living animals including humans exhibit this type of nutrition. In this mode of nutrition, the food may be a small bacterium, a plant or an animal. Here,the food is first taken into the body through an opening called a mouth (ingestion
Ingestion
Ingestion is the consumption of a substance by an organism. In animals, it normally is accomplished by taking in the substance through the mouth into the gastrointestinal tract, such as through eating or drinking...
), then it is converted into a simple and soluble form by various enzymes (digestion
Digestion
Digestion is the mechanical and chemical breakdown of food into smaller components that are more easily absorbed into a blood stream, for instance. Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones....
); simplified products thus formed are then absorbed (absorption); the conversion of nutrient into the fluid or solid substance of the body (Assimilation); and finally the undigested part of food is removed from the body (egestion). This type of nutrition occurs mainly in single celled organisms such as Amoeba.