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Egestion and Excretion Differences in Biology Import Concepts Must to Know

Question. Difference Between Egestion and Excretion.

Answer:

Excretion:

  • Excretion, in biology, is the process by which organisms expels metabolic waste products and other toxic substances from their body
  • Excretion is observed in every living organism; hence, it is an important life process. Excretory products are created as a by-product of metabolic and non-metabolic activities. The waste products animals generate are classified as either metabolic wastes or non-metabolic wastes.
  • Metabolic wastes are generated as a by-product of metabolic activities. Examples of metabolic wastes include gases, liquids and solids. Non-metabolic wastes are generated when a substance is no longer usable or digestible by an organism.
  • Even plants excrete wastes – for instance, the process of photosynthesis results in the creation of oxygen and water. Both these substances are considered as waste products and require removal.
  • Even unicellular organisms produce waste products – Thiobacillus dentifrices, a denitrifying sulphur bacterium, produces nitrogen gas as the excretory product. Rubber trees exude latex and resins as waste products.
Illustration: Egestion and Excretion Differences in Biology Import Concepts Must to Know

Egestion:

  • Egestion is the removal of food and liquids from the gastrointestinal tract. This means that after the digestive system processes the food and liquid, wastes are also removed. This is accomplished by the digestive system, which is located inside the abdominal cavity.
  • The main parts of this system are the stomach, small intestine, and colon. These organs, the liver, kidneys, and other glands, and exocrine and endocrine glands, all participate in the process of egestion.
Illustration: Egestion and Excretion Differences in Biology Import Concepts Must to Know
Table of Difference between Egestion and ExcretionTable of Difference between Egestion and Excretion
Differentiating PropertyEgestionExcretion
DefinitionEgestion is the removal of undigested food from the body.Excretion is the release of wastes from the body.
Type of WasteUndigested food and other toxins left after digestion.Metabolic wastes including carbon dioxide, sweat etc.
Occurs inIt occurs only in animals.It occurs in plants as well as animals.
OrgansIt usually occurs rarely through the mouth.It occurs through kidneys, lungs, skin.
Materials ReleasedThe faeces are released through egestion.Sweat, urine, carbon dioxide is released through excretion.
SystemEgestion is a part of the digestion process.Excretion is the main function of the excretory system.
SignificanceIt completes the process of digestion.It keeps the cells of the body clean.