Transcript Pre-Lab Slide Show

The Grasshopper
Introduction
•Insects are arthropods with jointed
appendages, segmented bodies,
and an exoskeleton composed of
chitin. Insects are in the class
Insecta, & are the largest and most
diverse group of animals on earth.
Characteristics
• Insects have three body regions
(head, thorax, & abdomen), 3 pairs of
legs attached to the thorax, a single
pair of antenna attached to the head,
mouthparts adapted for chewing or
sucking, and two pairs of wings.
Some insects may have a single pair
of wings or may be wingless.
Adaptations
• Insect legs are often adapted for digging,
crawling, jumping, or swimming. Insects
are mostly terrestrial and breathe air
which enters small lateral openings on
the body called spiracles and circulates in
a system of ducts to all organs and
tissues. Their chewing or sucking mouth
parts are adapted for feeding on plant
or animal materials.
Life Cycle
Simple Metamorphosis
Classification
Kingdom - Animalia
Phylum - Arthropoda
Class - Insecta
Order - Orthoptera
Lab Objective
• Identify & label
the external &
internal
anatomy of a
grasshopper.
Materials
• goggles
• dissecting pan
• forceps
• dissecting scissors
• hand lens
• plastic bag
• preserved grasshopper
Gloves can be provided, IF NEEDED!!
Procedure
• External Anatomy
• HEAD
• THORAX
• ABDOMEN
• Internal Anatomy
• MUSCLES
• BODY SYSTEMS
Anatomical
Terminology
• Dorsal -
Back or forward part.
• Ventral -
Abdominal or lower side.
• Anterior -
Forward or front part.
• Posterior -
Hind or rear part.
• Median -
Towards the middle.
• Lateral -
Side.
Miscellaneous
• Hand sanitizer will be provided for use at
the end of the dissection.
• Students should wash their hands with
soap and water prior to eating lunch.
• Please bring any injury sustained during
the dissection to the attention of an adult
immediately.
Clean Up
DAY 1
• Biological material in
plastic bag with class
period & name. Place on
dissecting tray.
DAY 2
• Biological material in
plastic bag and trash bag.
• Dissecting tray in trash.
• Wash tools and return to • Wash tools and return to
table.
table.
• Clean lab bench and
table.
• Clean lab bench and
table.
Assessment
LAB HANDOUT
• Pre-Lab Questions
– Completed in class
• Anatomy Questions
– Completed in class
• Analysis & Conclusion
Questions
– Distributed at the end
of the dissection to be
completed for
homework
DIAGRAMS
• External Features of
the Grasshopper
– Completed in class
• Specialized Features of
the Grasshopper Head
– Completed in class
• External Appendages
of the Grasshopper
– Completed in class
A good
dissection
takes . . .
“Patience, young
grasshoppers . . .
patience!”