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13 Cards in this Set
- Front
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Animal Nutrition |
Process by food is taken in taken in for make use in different body functions. ■)Typically food is broken down in to smaller molecules and absorbed prior to utilisation. ■)They are heterotrophs |
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Heterotrophic nutrition |
Process by which the organisms obtain organic food molecules by ingesting other organisms or by substances derived by other organisms |
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Two types of heterotrophic nutrition |
1) Holozoic nutrition 2)Symbiosis *other than animals majority of bacteria and fungi are also heterotrophic . |
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Holozoic Nutrition |
#)Most of animals are holozoic where they ingest food into their ailmentary canal. #)Consist of 5 main stages. *Ingestion *Digestion *Absorptiom *Assimilation *Elimination |
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Symbiosis |
Ecological relationship between organisms of two different species that live closely together. *)Parasitism *)Commensalism *)Mutualism |
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Mutualism |
Close association between two living organisms of different species which benefits both organisms. *)Cellulose digesting micro organisms in Ruminants and Termites |
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Parasitism |
Close association between two living organisms of different species which is beneficial to one (parasite) and harmful to the other(host). Parasites live within or on the host and derive its nourishment Eg- Tape worm and humans Lice and humans |
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Commensalism |
Close association between two living organisms of different species which is beneficial to one and does not affect the other (harmful nor benificial) *)Barnacles attached to whales |
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Ingestion |
★This is the first stage where feeding or eating happens. ★Food sources differ among animal species and they possess different modes of ingestion according to the diet or the environment. |
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Digestion |
★Food is broken down in to molecules small enough to pass through the membranes and enter the cells of the organisms. ★Digestion could occur mechanically (teeth or muscle contractions) or chemically (enzymes). ★ During mechanical digestion, food is broken down in to smaller fragments thus increasing surface area for efficient chemical digestion. ★ During chemical digestion, enzymes break bonds in large molecules to small molecules. |
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Absorption |
In this stage , animal cells take up the small molecules. -simple sugars, amino acids. |
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Assimilation |
Process of utilization of absorbed nutrients for various functions of the body |
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Elimination/Egestion |
In this undigested materiels are passed out from the ailmentary canal. |
