Long Answer Questions. Answer in detail. (1.) List and briefly describe the five steps of digestion.
Answers
ingestion, propulsion, mechanical digestion, chemical digestion, absorption, and defecation.
Answer:
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Most animals take food into the body through the mouth. This mode of feeding is called holozoic nutrition .Holozoic nutrition occurs in five stages .
ingestion →digestion→ absorption →assimilation → egestion.
Ingestion
Ingestion is the proces by which an organism takes food into its body. differently . Different animals ingest food differently. Most of the a have special organs to ingest food.
Digestion
The food taken in by animals is normally complex. The cells in an animal's body cannot absorb food in this form. Hence, they have to break down the complex food into simple, soluble substances with the help of digestive juices produced in the body. The process of converting complex food into a simple and soluble form is known as digestion. Most animals use physical and chemical methods for digesting food.
Absorption
It is the process by which the digested food is passed into the blood so that it can be transported to different parts of the body by the circulatory system.
Assimilation
It is the process through which the absorbed food is utilised for energy, growth and development.
Egestion
It is the process by which undigested food material in the form of faeces is removed from the body.
Different animals have different body structures. Therefore, the process of nutrition will also be different in them.
Explanation:
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