The Grasshopper

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Would you eat a grasshopper?

Arthropods

InsectsThere are more than 700,000 species that have been

classifiedThey are the largest & most diverse group on earth

Insects have three body regionsHead, thorax, and abdomen

Masters of disguise

Dissecting

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Mouth parts

• Mandibles- holding food• Labrum- holding food• Maxillae- chewing food• Labium-holding food and tasting

Head

• Antennae• Eyes ( simple)• Mouth ( adapted so they can chew plants)

• They have crop and gizzard for grinding food

Thorax

• Three pair of legs (Legs are adapted for jumping to escape predators)

• One or two pair of wings– Some insects only have wings part of their life, or

not at all

Abdomen

• Where the reproductive structures are found• Insects have an open circulatory system and

their blood DOES NOT carry oxygen• They have spiracles instead- where air enters

and waste gas leaves the body (oxygen & CO2)

Kingdom Animalia- Phylum Arthropoda-

Class InsectaOrder Orthoptera

Head

•Antennae (two, slender appendages)Compound eyes (2, large lateral)Ocelli (or simple eyes) - 3, small, between compound eyesMouth parts - Labrum (upper lip), mandibles (jaws) below the labrum, maxillae located behind the mandibles to help cut & hold food, and the lower lip or labium

Tympanic membrane

ABDOMEN

•Spiracles (small openings on the side of somites or body segments)Auditory Organs (two located laterally on the 1st body somite or segment)Ovipositor (on female)

Ovipositor

THORAX

•Legs (first 2 pairs are for walking & the last pair are for jumping)Wings (forewings have a leathery appearance & protect the hind wings)

Part 2 Dissection