Animal Nutrition Flashcards
define animal nutrition
it’s the process by which food is taken in for make use in different body functions
give examples for heterotrophs
animals
fungi
majority of bacteria
define heterotrophic nutrion
the process by which organisms obtain organic food molecules by ingesting other organisms or by substances derives from other organisms
2 types of heterotrophic nutrition
- Holozoic nutrition
- Symbiosis
Define holozoic nutrition
Animals ingesting food into their alimentary canal is holozoic nutrition
5 stages of holozoic nutrition
- Ingestion
- Digestion
- Absorption
- Assimilation
- Egestion / Elimination
Describe ingestion
- Ingestion is the first stage where the act of eating/feeding happens
- Food sources differ among animal species and they possess different modes of ingestion according to diet and environment
Define ingestion
Ingestion is the first stage where the act of eating/feeding happens
How do modes of ingestion differ?
according to diet and environment
Describe digestion
- digestion is when food is broken down into molecules small enough to pass through the membranes and enter cells of organisms
- Digestion could occur mechanically (by teeth/ muscle contractions) and chemically (by enzymes)
- During mechanical digestion, food is broken down into smaller fragments and thus increase surface area for efficient chemical digestion
- During chemical digestion enzymes break bonds in large molecules to small molecules
define digestion
digestion is when food is broken down into molecules small enough to pass through the membranes and enter cells of organisms
2 types of digestion
mechanically (by teeth/ muscle contractions) and chemically (by enzymes)
describe mechanical digestion briefly
During mechanical digestion, food is broken down into smaller fragments and thus increase surface area for efficient chemical digestion
describe chemical digestion briefly
During chemical digestion enzymes break bonds in large molecules to small molecules
define absorption
- in this stage, animal cells take up small molecules (simple sugars, amino acids)
