External Structure of Insects, Functions & Locomotion

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Presentation transcript:

External Structure of Insects, Functions & Locomotion Insect surface: exoskeleton & epidermis Head: Mouthparts, Antennae, Eyes Thorax:Thoracic segments, Wings, Legs Abdomen: Segments,Ovipositor,Cerci,Style

REMEMBER EXOSKELETON? FUNCTION??

Function of Exoskeleton Body support Protection Water conservation Location of muscle attachment - allows movement Colouration & Camouflage

THE INSECT SURFACE Dermal gland: produce pheromone, repellant (Exoskeleton) - glycoprotein Dermal gland: produce pheromone, repellant

Exoskeletal Parts Tergite/Tergum (Dorsal,Abdomen) Notum (Dorsal, Thorax) Pleurum (Lateral thorax) Sternite/Sternum (ventral abdomen)

MOUTH PARTS Clypeus Labrum (“upper lip”) Labium (‘lower lip’) Mandibles (‘jaw-like) Maxillae

ADAPTATIONS OF THE MOUTHPARTS MANDIBULATE – HAUSTELLATE – A) Stylet – B) Proboscis – C) Sponging –

THE EYES 2 Types: a) Compound eye b) Ocelli (sing. Ocellus)

THE ANTENNA For touch and smell ( some case hearing)

THORAX Pro,meso,meta Notum & Pleuron Wings Legs

THORAX HALTERE -balancing- FORE WING PRO MESO META DIPTERA- TRUE FLIES

NOTUM (DORSAL) PLEURON (LATERAL)

LEGS femur trochanter tibia coxa Tarsus/tarsi

TYPES OF INSECT’S LEGS CURSORIAL

FOSSORIAL

RAPTORIAL

SALTATORIAL

NATATORIAL

POLLEN COLLECTING

WINGS ELYTRON TEGMINA HEMIELITRON MEMBRANOUS HALTERE SCALE-LIKE FRINGED

Fringed-like

Scale-like wing (butterflies & moths)

INSECTS LARVAE CAMPODEIFORM

CARABIFORM (pg 29) flattened, well-developed legs Carabidae (beetle) short legs, short cerci and a flattened body.

SCARABAEIFORM

ELATERIFORM Wireworm

ERUCIFORM

PLATYFORM

VERMIFORM

INSECTS PUPAE EXARATE (EKSARAT)

OBTECT (OBTEK)

COARCTATE (KOARKTAT)