Download Lesson# 1 - External Anatomy of Insects

Lesson# 2 – Insect
Anatomy
Unit: Entomology
Ms. Gutierrez
In a group:
Create an insect out of the play dough
provided.
 Be ready to present your insect to the
entire class. Include in presentation:
# of legs
wings
Any significant characteristics.
Lets get started!
An insect is an animal whose body is
divided into three regions with three pairs
of legs on the middle region and contain
an exoskeleton.
 They also have one pair of antennae, and
one to two pairs of wings attached to the
middle region if present in the adult form.

What is an Insect?
Insect Anatomy
Head- contains
one pair of
antennae, two
pairs of eyes, and
mouthparts.
1. Head
◦ Thorax- three
pairs of legs and
wings if present..
2. Thorax
 Prothorax - Pair of
front leg
 Mesothorax – Pair of
middle legs and first
pair of wings
present.
 Metathorax – Pair of
hind legs and hind
wings if present.
◦ Abdomen- the
abdomen is
composed of as many
as eleven segments
but never hears legs
or wings.
◦ A pair of spiracles
are located on each
segment of the
abdomen. Spiracles
are how the insect
gets oxygen.
3. Abdomen

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Exoskeleton
Insects have an
exoskeleton that is
made of material
called chitin.
Advantages-protects
the insect from
enemies, keeps them
from drying out, and
it protects them from
diseases.
Disadvantage-is it is
brittle and restricts
movement.
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Filiform
Setaceous
Capitate
Pectinate
Plumose
Stylate
12 Types of Antennae
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Moniliform
Ciavate
Lamellate
Bipectinate
Aristate
Serrate
Antennae

The antennae are
sensory organs for
insects, they help
the insect in
locating food,
finding remote
nesting sites, and
locating mates.
How do Insects eat?
•Aphid
•Leafhoppers
•Mosquitoes
(Females)
•True Bugs
•Mites
Piercing-Sucking Mouthparts
Thrips
Rasping-Sucking Mouthpart

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Grasshopper
Beetles
Dragonflies
Caterpillars
Chewing Mouthparts
Flies
Sponging Mouthpart
•Bees
•Ants
•Wasps
•Sawflies
Chewing-Lapping Mouthpart
•Moths
• Butterflies
Siphoning Mouthpart
Parts of an insect leg
Types of Insect Legs
Lets Rhyme!

Insects must have:



# of common
mouthparts:
# of antenna:
Number of leg
types:
3 body segments,
antenna,
exoskeleton, 6 legs.
6 common types we
discussed.
12 Types of antenna
6 types of legs.
Summarize what we’ve learned!