790 likes | 1.07k Views
ARTHROPODS. HOLT CH. 29 PG. 701-711. ARTHROPOD CHARACTERISTICS. Segmented body. ARTHROPOD CHARACTERISTICS. Segmented body Jointed appendages. ARTHROPOD CHARACTERISTICS. Segmented body Jointed appendages Hard external skeleton. ARTHROPOD CHARACTERISTICS. Segmented body
E N D
ARTHROPODS HOLT CH. 29 PG. 701-711
ARTHROPOD CHARACTERISTICS • Segmented body
ARTHROPOD CHARACTERISTICS • Segmented body • Jointed appendages
ARTHROPOD CHARACTERISTICS • Segmented body • Jointed appendages • Hard external skeleton
ARTHROPOD CHARACTERISTICS • Segmented body • Jointed appendages • Hard external skeleton • Most have open circulatory system
ARTHROPOD CHARACTERISTICS • Segmented body • Jointed appendages • Hard external skeleton • Most have open circulatory system • Many have wings
SEGMENTED BODY • Individual body segments in larval stage
SEGMENTED BODY • Individual body segments in larval stage • Adults show 3 body segments • Head • Thorax (chest) • Abdomen • SOME display CEPHALOTHORAX (head and chest fused together)
JOINTED APPENDAGES • APPENDAGE-structure that extends form arthropod’s body wall
JOINTED APPENDAGES • APPENDAGE-structure that extends form arthropod’s body wall • ARTHROPOD=“jointed foot”
EXOSKELETON • EXOSKELETON-made of carbohydrate CHITIN-thin/flexible • Muscles attach • Appendages attach
EXOSKELETON • EXOSKELTON-made of carbohydrate CHITIN-thin/flexible • Muscles attach • Appendages attach • WATERPROOF
EXOSKELETON • EXOSKELTON-made of carbohydrate CHITIN-thin/flexible • Muscles attach • Appendages attach • WATERPROOF • PROTECTION
REPSIRATION AND CIRCULATION • SPIRACLES-air enters body through these openings
REPSIRATION AND CIRCULATION • SPIRACLES-air enters body through these openings • TRACHEA-tubes there air travels from spiracles to bloodstream
REPSIRATION AND CIRCULATION • SPIRACLES-air enters body through these openings • TRACHEA-tubes there air travels from spiracles to bloodstream • Aquatic arthropods breath with gills
REPSIRATION AND CIRCULATION • SPIRACLES-air enters body through these openings • TRACHEA-tubes there air travels from spiracles to bloodstream • Aquatic arthropods breath with gills • OPEN CIRCULATORY SYSTEM
REPSIRATION AND CIRCULATION • SPIRACLES-air enters body through these openings • TRACHEA-tubes there air travels from spiracles to bloodstream • Aquatic arthropods breath with gills • OPEN CIRCULATORY SYSTEM • Terrestrial arthropods breath with BOOK LUNGS
FEEDING/DIGESTION/EXCRETION • Many mouthparts/appendages for taking in food
FEEDING/DIGESTION/EXCRETION • Many mouthparts/appendages for taking in food • MALPIGHIAN TUBULES-excretory system of arthropods-
FEEDING/DIGESTION/EXCRETION • Many mouthparts/appendages for taking in food • MALPIGHIAN TUBULES-excretory system of arthropods- • Waste leaves through anus
COMPOUND EYE • Composed of thousands of individual visual units
COMPOUND EYE • Composed of thousands of individual visual units • SOME also have simple eyes (single lenses)-see only light and dark, not images
LIFE CYCLE • Most reproduce sexually
LIFE CYCLE • Most reproduce sexually • Usually internal fertilization
LIFE CYCLE • Most reproduce sexually • Usually internal fertilization • Many have specialized reproductive organs
LIFE CYCLE • Most reproduce sexually • Usually internal fertilization • Many have specialized reproductive organs • MOLTING-shedding of exoskeleton to allow for growth
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA)
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA) • HEXAPOD-insects
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA) • HEXAPOD-insects • MYRIAPODA-millipeds/centipedes • CRUSTACEA-lobsters/shrimp
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA) • HEXAPOD-insects • MYRIAPODA-millipeds/centipedes • CRUSTACEA-lobsters/shrimp • CHELICERATA-spiders
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA) • HEXAPOD-insects • MYRIAPODA-millipeds/centipedes • CRUSTACEA-lobsters/shrimp • CHELICERATA-spiders • SEE PG. 705!!!
GROUPS OF ARTHROPODS • 4 main groups (SUBPHYLA of phyla ARTHROPODA) • HEXAPOD-insects • MYRIAPODA-millipeds/centipedes • CRUSTACEA-lobsters/shrimp • CHELICERATA-spiders • SEE PG. 705!!!
SUCCESS OF ARTHROPODS • More arthropods than all other animal groups COMBINED
SUCCESS OF ARTHROPODS • More arthropods than all other animal groups COMBINED • More than 5 million species identified (and growing)
SUCCESS OF ARTHROPODS • More arthropods than all other animal groups COMBINED • More than 5 million species identified (and growing) • Exoskeleton provides protection (land and water)
SUCCESS OF ARTHROPODS • More arthropods than all other animal groups COMBINED • More than 5 million species identified (and growing) • Exoskeleton provides protection (land and water) • Wide range of food sources and habitats
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs)
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS • No antennae • CEPHALOTHORAX (head chest)
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS • No antennae • CEPHALOTHORAX (head chest) • ABDOMEN (belly)
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS • No antennae • CEPHALOTHORAX (head chest) • ABDOMEN (belly) • ARACHNIDS-largest class
ARACHNIDS • SUBPHYLUM CHELICERATA (spiders, scorpions, mites, ticks and horseshoe crabs) • Have appendages called CHELICERAE (1st pair of appendages specialized for feeding) • Modified into pincers or fangs • PEDIPALPS-2nd pair of appendages-catch and handle prey • 4 pair of WALKING LEGS • No antennae • CEPHALOTHORAX (head chest) • ABDOMEN (belly) • ARACHNIDS-largest class
CLASS ARACHNIDA • All (except some mites) are carnivores
CLASS ARACHNIDA • All (except some mites) are carnivores • Most terrestrial
CLASS ARACHNIDA • All (except some mites) are carnivores • Most terrestrial • Don’t have jaws (consume only liquid food)
CLASS ARACHNIDA • All (except some mites) are carnivores • Most terrestrial • Don’t have jaws (consume only liquid food) • Enzymes turn prey into liquid (see pg. 710-711)
CLASS ARACHNIDA • All (except some mites) are carnivores • Most terrestrial • Don’t have jaws (consume only liquid food) • Enzymes turn prey into liquid (see pg. 710-711) • Most do more good than harm (predators of insects)