Transcript What Makes an Insect..

What Makes an Insect
an Insect?
(p. 14-15)
1.size
• range from 1/100 inch to 13+ inches long
2.exoskeleton
• means
“hard outer covering”
• 3 purposes (functions):
• helps protect their internal (inside)
organs
• helps keep them from drying out
• muscles are connected to the
exoskeleton
segments
3.
• 3 main body parts:
• 1) head
• 2) thorax (legs & wings attached here)
• 3) abdomen
4.legs
• most have 6 legs
• legs can tell us where it lives & what it
eats
5. wings
• is the only invertebrate that can fly
• most have 4 wings
• only the adults have wings
two types:
6.compound
eyes simple
eyescompared to us
•poor eyesight
•very large
•on the side of the head with
many lenses
•each lens forms one image
•small triangle, located
between compound
eyes
7. entomologist
• a scientist who studies insects
8.antennae
• used to feel, smell, and hear
• two, located on head
9.sensory
hairs
• covered with “sensory” hairs that can
notice movement, pressure, smell, and
sound
• hairs are connected to central nervous
system
10. insect
blood
• simple circulatory system which means
they DON’T have a complicated system
of veins and arteries
• simple heart pumps blood into “open”
body parts
• nearly colorless
• blood carries dissolved food and waste
materials
11.pheromones
• a chemical that carries messages to
other insects
• attracts a mate
• leads others to food