6 NUTRITION6 NUTRITION
What is Nutrition?What is Nutrition?
The entire process by which organism
obtain energy from food for growth,
maintenance...
6.1 Type of Nutrition6.1 Type of Nutrition
Two main types:
1. Autotrophic
2. Heterotrophic
1. Autotrophic1. Autotrophic
 A process in which organisms synthesise
organic substances from inorganic
substances
 Auto...
The synthesis of food using light
energy – photosynthesis (photo –
light)
Photoautotroph – organisms which
produce organ...
The synthesis of food using chemical
energy – chemosynthesis (chemo –
chemical)
Chemoautotroph – organisms which
synthes...
2. Heterotrophic2. Heterotrophic
A type of nutrition in which organism
obtain energy through the intake and
digestion of ...
They may practice
a) Holozioc nutrition,
b) Saprophytism
c) Parasitism
- holo –like, zoon – animal
- The organism feeds by ingesting
solid organic matter which is
subsequently digested and
abso...
- The organism called saprophytes
- Feed on dead and decaying
organic matter
- Digest their food externally
before absorbi...
- The organism called parasite
- Obtain nutrient from living on
(ectoparasites) or in (endoparasites)
the body of another ...
Test YourselfTest Yourself
1. Differentiate between autotrophic and
heterotrophic nutrition.
A: Autotrophic nutrition – A ...
2. Name two types of autotrophic
nutrition.
A: Photosynthesis and chemosynthesis
Test YourselfTest Yourself
3. Name three types of heterotrophic
nutrition.
A: Holozoic nutrition, saprophytism and
parasitism
Test YourselfTest Yours...
4. Name the nutritional habits of the
following organisms;
a) Pitcher plants
A: holozoic nutrition
b) Green algae
A: photo...
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6570567 61 types-of-nutrition

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6570567 61 types-of-nutrition

  1. 1. 6 NUTRITION6 NUTRITION
  2. 2. What is Nutrition?What is Nutrition? The entire process by which organism obtain energy from food for growth, maintenance and repair of damaged tissues Nutrient – the substances that are required for the nourishment of an organism
  3. 3. 6.1 Type of Nutrition6.1 Type of Nutrition Two main types: 1. Autotrophic 2. Heterotrophic
  4. 4. 1. Autotrophic1. Autotrophic  A process in which organisms synthesise organic substances from inorganic substances  Autotroph = Auto – self, trophos – feed (organism which can make their own food)  The source of energy for synthesising food can be either light energy or chemical energy.
  5. 5. The synthesis of food using light energy – photosynthesis (photo – light) Photoautotroph – organisms which produce organic molecules from carbon dioxide and water using sunlight as a source of energy Example: green plants
  6. 6. The synthesis of food using chemical energy – chemosynthesis (chemo – chemical) Chemoautotroph – organisms which synthesise organic compound by oxidising inorganic compound (hydrogen sulphide and ammonia) Example: certain bacteria (Nitrosomonas sp. and Nitrobacter sp.)
  7. 7. 2. Heterotrophic2. Heterotrophic A type of nutrition in which organism obtain energy through the intake and digestion of organic substances. Heterotroph =Hetero – other, trophos – feed (organism that cannot synthesis their own nutrients but obtain the nutrients from other organisms)
  8. 8. They may practice a) Holozioc nutrition, b) Saprophytism c) Parasitism
  9. 9. - holo –like, zoon – animal - The organism feeds by ingesting solid organic matter which is subsequently digested and absorbed into their bodies - Examples: humans, herbivores, carnivores and some carnivorous pitcher plants and Venus fly-traps a) Holozoic nutritiona) Holozoic nutrition
  10. 10. - The organism called saprophytes - Feed on dead and decaying organic matter - Digest their food externally before absorbing the nutrients into their bodies - Examples: bacteria, fungi b) Saprophytismb) Saprophytism
  11. 11. - The organism called parasite - Obtain nutrient from living on (ectoparasites) or in (endoparasites) the body of another living organism (host) - They absorbs readily digested food from its host - Examples: fleas (ectoparasites), lice, worms (endoparasites), Rafflesia plant c) Parasitismc) Parasitism
  12. 12. Test YourselfTest Yourself 1. Differentiate between autotrophic and heterotrophic nutrition. A: Autotrophic nutrition – A process in which organisms synthesise organic substances from inorganic substances Heterotrophic nutrition - A type of nutrition in which organism obtain energy through the intake and digestion of organic substances.
  13. 13. 2. Name two types of autotrophic nutrition. A: Photosynthesis and chemosynthesis Test YourselfTest Yourself
  14. 14. 3. Name three types of heterotrophic nutrition. A: Holozoic nutrition, saprophytism and parasitism Test YourselfTest Yourself
  15. 15. 4. Name the nutritional habits of the following organisms; a) Pitcher plants A: holozoic nutrition b) Green algae A: photosynthesis d) Tapeworm A: parasitism Test YourselfTest Yourself
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