INSECT NERVOUS SYSTEMS AND SENSE ORGANS. Types of Neurons unipolar bipolar multipolar axon.

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Presentation transcript:

INSECT NERVOUS SYSTEMS AND SENSE ORGANS

Types of Neurons unipolar bipolar multipolar axon

Insect Central Nervous System brainsubesophageal ganglion thoracic ganglia abdominal ganglia

Insect Brain protocerebrum hypocerebral ganglion recurrent nerve subesophageal ganglion tritocerebrum deutocerebrum frontal ganglion

corpus pedunculatum optic lobe hypocerebral ganglion recurrent nerve subesophageal ganglion frontal ganglion corpora cardiaca corpora allata Insect Brain - Dorsal View ingluvial nerve ingluvial ganglion

Stomatogastric Nervous System hypocerebral ganglion recurrent nerve frontal ganglion ingluvial nerve ingluvial ganglion

Sensory Organs - Mechanoreceptors seta (hair) epithelium trichogen cell tormogen cell membrane bipolar neuron HAIR SENSILLUM (TRICHOID SENSILLUM)

Sensory Organs - Mechanoreceptors coeloconic ampullaceous campaniform placoid

Sensory Organs - Mechanoreceptors Chordotonal organs scolopale neuron scolopidium

Johnston’s Organ

Chemoreceptors Thin-walledThick-walled

Chemoreceptors Thin-walled coeloconic plate basiconic

Insect Eyes

lens crystalline cone Semper’s cell primary pigment cell secondary pigment cell retinular cell rhabdom axons to CNS basement membrane Insect Eye

Two kinds of Eye