MOVEMENT IN ARTHROPODS

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Presentation transcript:

MOVEMENT IN ARTHROPODS © 2016 Paul Billiet ODWS

The Arthropods Oedipoda-germanica © P Billiet Arachnid © P Billiet Carcinus-maenas © P Billiet © 2016 Paul Billiet ODWS

Arthropod muscle system Inside an Arthropod Arthropod muscle system © 2016 Paul Billiet ODWS

The Arthropod Exoskeleton made of chitin – reinforced with calcium in crustaceans Limbs segmentally arranged Flexible joints permit movement Antagonistic muscles attach inside the tubular limbs Flexors and extensors are on the opposite sides of the limb to a vertebrate with its endoskeleton © 2016 Paul Billiet ODWS

The Arthropod Prionus coriarius © P Billiet © 2016 Paul Billiet ODWS

The Arthropod Movement is programmed by the nervous system Movement can be very fast (a cockroach can run at 1ms-1) Legs rise and fall in sequence down one side – a locomotory wave Alternating locomotory waves pass on each side of the body © 2016 Paul Billiet ODWS

Locomotary wave © 2016 Paul Billiet ODWS