41. Portfolio Item 8 – Key Features of Arthropods Three distinct body parts – head, thorax, and abdomen – and three pairs of legs. Bees, Beetles, Butterflies, Flies, and Grasshoppers Insecta Rounded bodies and two pairs of legs per body segment Millipedes Diplopoda Flat bodies and one pair of legs per body segment Centipedes Chilopoda Chewing jaws, and a pair of appendages on each segment of the thorax Crabs, Lobsters, and Shrimp Crustacea They have eight legs Spiders, Scorpions Arachnida Unique Features Example Name of Class
42. Biolab – Dissection of a Grasshopper: External Anatomy Long wings used for flying. Forewing / hind wing Hearing organ. Tympanum Valve-like opening in exoskeleton used for air. Spiracles Perceives odor, touch, humidity, vibration, wind velocity and direction. Antennae Simple – Detect light intensity, but cannot see. Compound – Made of individual units call ommatidia. Sees shape, color, movement, and distance. Eyes: Simple / Compound Allows for jumping – Has claws for clasping to objects. Legs Function Structure