The document discusses different modes of nutrition in living organisms. It defines nutrients as substances that provide nourishment for life and growth. Nutrition is the process by which organisms obtain and use food. Autotrophs, like plants, can produce their own food through photosynthesis. Heterotrophs depend on other organisms for food and include animals and non-green plants. Parasites live on or in hosts and get nutrients from them without benefiting the host. Saprophytes get nutrients from dead and decaying matter. Some plants, like pitcher plants and venus flytraps, trap and digest insects through insectivorous nutrition. Holozoic nutrition involves ingestion, digestion, and absorption of complex materials.

1. MODES OF
NUTRITION
Submitted To :
Dr. Manju Sharma
Asst. Professor of SOE,CUH
Submitted By :
Debashish Sahoo
Roll No. – 180069
SEC – A
B.Ed 4th Semester

2. NUTRIENTS :
• The substance that provides nourishment essential for the
maintenance of life and for growth.
• We all know that food is essential for all living organisms and
we also know that carbohydrates , proteins , fats , vitamins
and minerals are components of food . These components of
food are called Nutrients .

3. NUTRITION :
• The process of obtaining food and utilizing it to
grow, stay healthy and repair any damaged body part
is known as nutrition.
• Nutrients are the substances which provide nutrition.
• All living organisms need nutrients for proper
functioning and growth. But they show divergence in
how they fulfill this demand. Some animals use
simple inorganic compounds to obtain their food.
While other animals use complex compounds as their
source of food. The mode of nutrition varies from
one species to another.

4. MODES OF NUTRITION :
MODES OF
NUTRITION
AUTOTROPH
IC MODE
HETEROTROPHIC
MODE
PARASITI
C
INSECTIVOROU
S
SAPROPHYTIC HOLOZOIC

5. AUTOTROPHIC NUTRITION :
• The term “ AUTOTROPH ” is derived from two
Greek words “ Auto means SELF and Trophos
means NOURISHMENT .
• The organisms that can make food themselves
from simple substances like carbon dioxide
and water on the presence of Chlorophyll
pigment and Sun light are called autotrophs.
• Their mode of nutrition is referred to as
autotrophic. They do this by the process of
photosynthesis.

6. HETEROTROPHIC NUTRITION :
• The word ‘Heterotroph’ is derived From Two Greek words— Heteros
means OTHER And Trophos means NOURISHMENT .
• Heterotrophs depend on other organisms for their food, they are
called consumers.
• All animals and non-green plants like fungi come under this category.
• Acc. to the environment and adaptations , consumer may eat plants
(herbivores) and others eat animals (carnivores) while few eat both
(omnivores).

7. PARASITIC
• Parasitic organisms or parasites, live
on or inside other living organisms
called hosts and obtain their food
from them.
• The host does not get any benefit
from the parasite.
EX : Cuscuta (amarbel),
hookworms, tapeworms, leeches, etc.

8. SAPROPHYTIC
• The saprophytic plants derive nutrition
from dead and decaying plants and
animals.
• They dissolve the dead and decaying
matter by secreting digestive juices and
absorb the nutrients.
EX: Mushrooms, moulds

9. INSECTIVOROUS
• Some plants have special structural
features that help them to trap insects
and are commonly known as
Insectivorous plants.
• These plants digest the insects by
secreting digestive juices and absorb
the nutrients from them.
EX : Pitcher plant, venus flytrap

10. HOLOZOIC
• Holozoic nutrition is the mode of
heterotrophic nutrition that involves
ingestion, digestion, absorption and
assimilation of solid and liquid material.
• This type of nutrition is exhibit by taking
complex substances and converts them
into simpler substances.