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Phylum Arthropoda ______________________on earth Examples: ____________________________, lobsters, insects ____________________species are unidentified Characteristics of Arthropods 1. ______________________________ 2. Specialized body segments called _________________________ 3. Specialized respiratory structure 4. Advanced sensory system Insect Shedding Exoskeleton Exoskeleton •Epidermis secretes ___________________________ •Provides protection •Prevents _____________________________ 3 Layers to Exoskeleton •Outer _________________ •Middle _______________ •Flexible _________________ Cicada Exoskeleton Exoskeleton Terms Molting _____________________during growth Metamorphosis changing ___________________ development Complete: egg larva pupa adult Incomplete: egg nymph adult Segments of Insect 1. Head 2. Thorax 3. Abdomen Specialized Appendages Pincers _____________________________ Mouthparts ___________________ Antennae ______________________________ Scorpion Pincer Pincers of a Fire Ant Respiratory System Very efficient gas exchange Trachea _______________to take in Oxygen Book Lungs -> ___________for gas exchange Gills aquatic _______________________ Digestion Feeding _________________________________ Grasshopper Eating a Leaf Praying Mantis Eating a Cricket Response Brain & Nerve Chords coordinate movement and senses Compound Eyes ___________________detectors, each with its own lens Excretion Terrestrial ________________________ sacs which remove water waste & add to feces Aquatic diffusion Malphigian Tubule of a Cockroach Circulation All have _______________________ Very Few or No Blood Vessels Reproduction Separate Sexes Terrestrial __________Fertilization Aquatic ____________Fertilization Classes of Arthropods Crustacea ________________________________ _____ body segments (thorax & abdomen) _______ pairs of legs Classes of Arthropods Arachnida _________________________________ ______ body segments (thorax & abdomen) ______pairs of legs ____________________________________ Classes of Arthropods Insecta ______________________________ _____segments (head, thorax, abdomen) _________ pairs of legs social behaviors Dung Beetle Leopard Moth Classes of Arthropods Chilopoda ___________________ Many body segments 1 pair of legs per segment _______________________ Silverfish- Not a Centipede! I won’t bite you! Centipede I can bite you! Classes of Arthropods Diplopoda _________________ Many body segments __ pairs of legs per segment _______________________ I’m a Millipede! Phylum Amphibia -Vertebrates that live on land and in water -_______ million years ago amphibians came out of water -Breathed Oxygen from air when water was stagnant -Includes ______________________________ Golden Bell Frog Red-Backed Salamander I live near you! Characteristics of Amphibians -_____________________to support weight -Developed respiratory system with __________ -Moist skin that absorbs additional oxygen __________________________ -Advanced nervous system with ________________ Hello! Organs of the Frog -Skin- For respiration -Nares- Take in Oxygen -Tongue Used for catching prey -Liver- Detoxifies Harmful substances -Stomach-Mixes food with gastric juices; sends food to SI -Gall Bladder- Stores Bile -Pancreas-Secretes enzymes and hormones for digestion -Small Intestine – Absorbs nutrients and sends undigested food to LI -Fat Bodies-Fat source for frog during hibernation -Kidney –Produces and excretes Urine -Spleen—Stores and purifies blood -Heart- pumps blood throughout the body -Lungs- Takes in Oxygen and distributes to blood -Testes- Male sex organs -Ovaries- Female sex organs