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Characteristic Of Animals Most are Motile No Cell Walls Heterotrophic Multicellular Eukaryotic 2 3 What must animal do in order to 4 survive? • Feeding- Energy • Respiration- Exchange gases • Circulation- move materials around the body • Excretion- get rid of waste • Response- react to external stimuli. • Movement- Move from place to place. • Reproduction- create new organisms. 5 6 Phyla of invertebrates include 7 1. Porifera 2. Cnidarian 3. Flatworms 4. Roundworms 5. Segmented worms 6. Mollusks 7. Arthropods 8. Echinoderms 8 9 10 11 Medusa Polyp Immobilize and kill prey with stinging cells on tentacles 12 Body Plan Radial Symmetry Have tissues 13 14 15 •Soft, Flattened •Have tissues and internal organs •Have a simple nervous system. •Bilaterally symmetrical •Gas exchange through skin. 16 Cool Fact! They can regenerate missing parts and even grow a new planaria from a piece of one! 17 18 Roundworms, hookworms free-living and parasitic aquatic and terrestrial Digestive system with two openings 19 Body •Unsegmented •Digestive system with two openings •Exchange gases through body wallsthrough diffusion 20 Diseases caused by roundworms: Trichinosis •In humans, can be contracted by eating infected pork. •5% of cases are fatal Ascarid Worm: •Matures in the intestines of the host •Eating vegetables that are not washed Hookworms •Soil •Walking barefoot •anemia, malnutrition, and in children causes under-development 22 23 Segmented, Bilateral symmetry Two way gut -Feed by sucking in soil and decaying matter Closed system-blood vessels Ex: Earthworms, leeches 24 Ecology: •Recycling in nature •Diet of many birds •Diet of fish 25 27 Latin mollus: “soft” Examples: snails, slugs, clams, squids, and octopi. 2nd Largest animal phylum on Earth • Almost all habitats • Soft-bodied animals, usually with a hard external shell. • Some have lost the shell completely. • Have internal organs • Shells are made of calcium carbonate 28 Feeding: Can be herbivores, carnivores, filter feeders, detritivores, or parasites. 29 Spiders, insects, centipedes, scorpions, shrimp, crabs, lobsters, butterflies 30 Major Characteristics: •Segmented bodies covered in an exoskeleton of chitin (Carbohydrate). •Jointed appendages •Legs, antennae •Three segments: •Head, Thorax, Abdomen 31 Exoskeleton Protection Helps prevent water loss Provides framework for muscle attachment Does not grow. When the organism outgrows it, it molts. •Metamorphosis (Insects) Adult stage and larval stage do not compete for food. •Feeding: Can be herbivores, carnivores, and omnivores. 33 Circulation •Open circulatory system • Well developed heart with arteries and vessels Reproduction •Internal fertilization land or external Aquatic 34.1 Response •Well developed nervous system with brain •Sensitive organs such as eyes and taste receptors 34.2 Clip Arthropod Diversity!! Clip 35 UPS DOWNS •Termites destroy wood •Moths eat cloth •Locusts destroy crops •Cotton Boll Weevils •Mosquitoes and diseases •Bees, butterflies, etc., pollinate crops •Some produce silk, wax, honey •Food 36 Termites Insects and communication Sounds- chirps, buzz Light- Male fireflies Chemicals- Pheromones (mate, danger, or alert) Insect Societies •Complex group that works together for the good of the colony. •Different roles are preformed by groups called castes. •Each castes has a different body form to carry out their specific task. •Very sophisticated communication. •Bees Dance! •Ants leave pheromone trails. Carpenter ant castes, from left to right: queen, winged male, major worker, minor worker 37 “Spiny Skin” ~7,000 species Sea stars, sand dollars, and sea urchins 38 Major Characteristics All are aquaticmarine Spiny skin Internal Skeleton Move with tube feet “suction cup” Sand dollars and sea urchins have moveable spines. 39 Feeding: •Various methods Sea Star: Pushes stomach out through its mouth (which is on the underside) into a clam and then digests. Can regenerate missing parts 40 •Ecology: •Major food source for other marine animals •Carnivorous echinoderms help control populations of clams •“Crown of Thorns” sea star destroys coral reef systems.