OTHER ARTHROPODS Slide show By Kelly Riedell http

OTHER ARTHROPODS Slide show By Kelly Riedell

http: //www. serc. si. edu/education/resources/bluecrab/molting. jsp MOLTING- Periodic shedding of exoskeleton to allow growth

http: //www. serc. si. edu/education/resources/bluecrab/molting. jsp • Growth puts pressure on old shell • Stimulating molting hormones to digest old exoskeleton and make new one underneath • Shell cracks open and animal backs out • Animal pumps up with water and expands • New shell hardens in few days • While waiting for new exoskeleton to harden = particularly vulnerable to predators “soft shelled crabs”

ENDOCRINE SYSTEM makes hormones that control: • • • MOLTING SEXUAL DEVELOPMENT METABOLISM

ARACHNIDS SPIDERS 8 legs No antennae Body constricted between cephalothorax and abdomen Excretory- Malpighian tubules Respiratory-Book lungs &/or trachea/spiracles Simple eyes with single lens Chelicera=fangs Spinnerets-release silk for webs

http: //www. csupomona. edu/~rskaae/CD 1/spiders. html BODYconstricted between abdomen + cephalothorax

http: //www. csupomona. edu/~rskaae/CD 1/spiders. html CHELICERA – modified fangs

http: //normlyon. homeip. net/photos/gallery/Macro%20 Photography/Jumping. Spider/040707_203446_1. htm PEDIPALPS – aid in holding food and chewing

http: //science. kennesaw. edu/~jdirnber/Invert. Zoo/Lec. Arthropod/Spider. X. jpg RESPIRATORY- Book lungs + spiracles

SPINNERETSrelease silk for webs Images from: http: //science. kennesaw. edu/~jdirnber/Invert. Zoo/Lec. Arthropod/Arthropod. html http: //www. elizapets. com/assets/images/Spider_Webs. JPG

Image from: http: //www. emc. maricopa. edu/Faculty/Farabee/BIOBK/insectexcret_1. gif EXCRETORY: MALPIGHIAN TUBULES collect and remove nitrogen waste via intestine

UNIRAMIA INSECTS: 6 legs Antennae 3 part body- Head, thorax, abdomen Excretory- Malpighian tubules Respiratory-Trachea/spiracles

http: //www. frcc. ca. us/home/instruct/disted/BIO 100 FRC_files/female%20 grasshopper. jpg RESPIRATORY- trachea & spiracles

Image from: http: //www. emc. maricopa. edu/Faculty/Farabee/BIOBK/insectexcret_1. gif EXCRETORY: MALPIGHIAN TUBULES collect and remove nitrogen waste via intestine

UNIRAMIA CENTIPEDES 1 pair of legs per segment flat bodies carnivorous with poison claws MILLIPEDES 2 pairs of legs per segment rounded bodies most herbivores Images from: http: //science. kennesaw. edu/~jdirnber/Invert. Zoo/Lec. Arthropod/Arthropod. html