Form 4 Biology Nutrition Types
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Transcript of Form 4 Biology Nutrition Types
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Why do we need food?Why do we need food?
To provide energyTo provide energy
To growTo grow To repair worn-out or damagedTo repair worn-out or damaged
tissuestissues
To maintain general healthTo maintain general health
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To state the types of nutritionTo state the types of nutrition
To explain autotrophic nutritionTo explain autotrophic nutrition To explain heterotrophic nutritionTo explain heterotrophic nutrition
To classify organisms according toTo classify organisms according tothe types of nutritionthe types of nutrition
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Types
Autotroph Heterotroph
Diet
Balanced In balance
Humans and
Animals
igestion
!odents
!uminant
Humans
Absorption
and
assimilationefaecation
Plants Technology
"roduction
"rocessing
#acronutrient #icronutrient
#echanism$actors
"hotosynthesis
Temperature
"hotosynthesis
%hemosynthesis
Holo&oic
'aprophytism
"arasitism
Hydroponics and
Aeroponics
'elective breeding
Tissue culture
(enetic
engineering
'oil
#anagement
Biological control
)utrient
re*uirement
+ight
intensity
%oncentration of
%arbon ioxide
%oo,ing
%anning
$ree&ing
"asteuri&ation
$ermentation
rying
NUTRITION
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Nutrition :a process by whichorganisms obtain food or nutrients
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AUTOTROPHIC NUTRITIONAUTOTROPHIC NUTRITION
A type of nutrition in which organismsA type of nutrition in which organismssynthesise the organic compoundssynthesise the organic compounds
food. they re*uire from inorganicfood. they re*uire from inorganic
substances/substances/ The organismsThe organisms autotrophsautotrophs auto 0 self1auto 0 self1
troph 0 nutrition.troph 0 nutrition.
The energy re*uired for synthesis ofThe energy re*uired for synthesis offoodfood sunlight sunlight photosynthesisphotosynthesis. 2. 2
chemical substances chemical substances chemosynthesischemosynthesis..
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PhotosynthesisPhotosynthesis
All green plantAll green plant
'ynthesising organic'ynthesising organiccompounds from %3compounds from %3445 H5 H443 in3 in
the presence of sunlight/the presence of sunlight/
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ChemosynthesisChemosynthesis
Synthesising organic compoundsSynthesising organic compoundsby using energy from the oxidationby using energy from the oxidation
of inorganic substances such asof inorganic substances such as
COCO22, hydrogen sulphide, nitrogen or, hydrogen sulphide, nitrogen orammonia.ammonia.
Chemoautotroph :Chemoautotroph : sulphur bacteria,sulphur bacteria,Nitrosomonas spNitrosomonas sp., Nitrobacter sp.., Nitrobacter sp.
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HETEROTROPHIC NUTRITIONHETEROTROPHIC NUTRITION
A type of nutrition in whichA type of nutrition in whichorganisms hae to depend anorganisms hae to depend anautotrophs or other organismsautotrophs or other organisms
as a source of energy as theyas a source of energy as theycannot synthesise their owncannot synthesise their ownfoodfood
!he organisms!he organisms heterotrophsheterotrophs " types : holo#oic," types : holo#oic,
saprophytism, parasitismsaprophytism, parasitism
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HOLOZOIC NUTRITIONHOLOZOIC NUTRITION
$eeding by ingesting complex$eeding by ingesting complex
organic matterorganic matter digesteddigested
absorbedabsorbed Animals % insectiorous plantsAnimals % insectiorous plants
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SAPROPHYTISMSAPROPHYTISM
NUTRITIONNUTRITION $eeding by$eeding by absorbing their requiredabsorbing their requirednutrients from dead organic matternutrients from dead organic matter
or theor theorganic excretory wasteorganic excretory waste ofoforganismsorganisms
CalledCalled saprophytessaprophytes(bacteria, fungi(bacteria, fungi mushrooms, yeasts & mushrooms, yeasts & Mucor spMucor sp.).)
PARASITISMPARASITISM
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$eeding by$eeding by absorbing their nutrients fromabsorbing their nutrients fromliving organismsliving organisms
Lives on or in the bodyLives on or in the bodyof a liing organismof a liing organism
&host' % obtains its nutrients from the host&host' % obtains its nutrients from the hostparasitesparasites
$leas, lice % tapeworm$leas, lice % tapeworm
(ndoparasites % ectoparasites(ndoparasites % ectoparasites
PARASITISMPARASITISM
NUTRITIONNUTRITION
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676!%I'6 8/9676!%I'6 8/9
9/9/ (ive the difference between(ive the difference between
autotrophs and the heterotrophs/autotrophs and the heterotrophs/
4/4/ +ist+ist threethreetypes of heterotrophictypes of heterotrophic
nutrition/nutrition/