This document discusses insects. It defines insects as animals with three pairs of legs, a segmented body divided into head, thorax, and abdomen, and typically two pairs of wings. It discusses entomology, the study of insects, and notes that insects are the most successful life form on Earth. It covers insect classification, physical characteristics, habitats, and sizes. Insects can be found nearly everywhere and range greatly in size, from the smallest at 0.17mm to the largest stick insect at over 36cm.

2. INSECTS

3. INSECTS
BY
Students name Umeed Maalik
Roll No 011
Department Environmental Sciences
Subject Title Biology-I (Basis of life:
Structural and functional
Modifications)
Course Code & number BIO-301
Assignment No.1 Title Insects
UNIVERSITY OF GUJRAT HAFIZ HAYAT CAMPUS
GUJRAT
GUJRAT, PUNJAB, PAKISTAN

4. CONTENTS
 INSECTS
 Entomology
 INSECTS ARE MOST SUCCESSFUL LIFE
FROM ON OUR PLANET
 CLASSIFICATION
 PHYSICAL CHARACTRISTICS OF PHYLUM
ARTHROPODA
 INSECTS POSSESS EVERY WHERE ON
THIS PLANET

5. Word Insect
The word insect is derived from Latin word
insectum; meaning notched (to cut into)
that refers to their segmented body .
Insectum was borrowed into English as
insect.

6. What are insects? INSECTS
ARE
Insects:
Organisms truly animals (having no
photosynthesis) characterized at adult stage by
three pairs of legs and a body divided into head,
thorax and abdomen and usually having two pairs
of wings, compound eyes and two antennae”.

7. Entomology:
Branch of zoology that
deals with the study of
insects:
Entomologist:
 Scientist or zoologist who study insects are called
entomologist.
 e.g. At UOG we have Pof. Dr Muhammad
Faheem Malik.And
 Prof.Dr Miss Summara Afsheen.

8. INSECTS ARE MORE
SUCCESS FULL LIFE FORM
ON OUR PLANET
 There is one insect out of every four animals of
this planet.
 It is predicted when planet earth will be destroyed
by atomic explosions and life goes to an end the
only living bodies that survives over that time are
the insects, like cockroaches that will eat all
destroyed decaying material of plants, animals and
so on.
 They have capacity to live even after
dynamite destruction.

9. Insects Include
 Butterflies
 Flies
 Mosquitoes
 Spiders
 Scorpions
 Ants etc.

10. CLASSIFICATION
Taxonomically Insects are
of
Kingdom Animalia
Phylum Arthropoda
Class 4.classes
Order 32.orders
Family 125.families
Genus ?
Species 500,000 species known
10,00,000 species expected

11. Phylum Arthropoda
Arthropoda from Greek words arthron
“joint “and poods “foot” which together
means jointed feet. e.g. Arachnids
,crustaceations etc.
An arthropod is an invertibrate that has an
exoskeleton, a segmenred body,adjointed
attachements (appendages).

12. Four Classes
 Body features based classes
Crustacea e.g Prawns, Crabs.
Myriapoda e.g Centipedes,
Arachnida e.g Spiders, scorpions.
Insecta e.g Bees, Flie.
 Thirty two Orders: The largest one is
coleoptera.

13. PHYSICAL
CHRACTRISTICS OF
INSECTS
 Insect’s eyes
 Insect’s senses
 Insect’s jaws
 Breathing
 Nervous system
 Movement

14. INSECTS POSSES EVERY
WHERE ON THIS PLANET
In sea:
A habitat of insects (few) is sea e.g. Marine
flies etc.
On land:
Frozen Extreme of Arctic and Antarctica is
habitate of insects that are alive and activate
during warm months.

15. In soil:
Beneath our feet e.g. Earthworm.
On soil around us e.g. ants.
In the air above our heads e.g.
mosquitoes,grasshopper.
In and on bodies of plants animals e.g. lics.
Drainage water:
In drainage water e.g. cockroaches.
In and over stagnant water:
Larvae of mosquitoes. They can five below
zero degree to over 48 degree centigrade.

16. SIZE
 The largest:
Insects in the world is the stick- insect,
“pharnacia kirbyi”
The female of which can be over 36cm
long.
 The smallest:
Known insect in the world is the
“Megaphragma Caribea”
of 0.17mm long.

17. SUMMARY
INSECTS
Word insects
What are insects? INSECTS ARE
Definition of insects
Entomology
Entomologist
INSECTS ARE MOST SUCCESSFUL LIFE FORM ON
OUR PLANET
Insects include
CLASSIFICATION
Phylum arthropoda
Four classes
Thirty-two orders

18. PHYSICAL CHARACTRISTICS OF PHYLUM ARTHROPODA
Insect’s jaws
Insect’s eyes
Insect’s senses
Breathing
Nervous system
Movement
INSECTS POSSESS EVERY WHERE ON THIS PLANET
In sea
On landS
In soil
Drainage water
In and over stagnant water
SIZE
The largest
The smallest