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CHAPTER 7 Animal classification Key science words vertebrate invertebrate symmetry TRAITS OF ANIMALS Animals are ____________ Must take in ________________ their surroundings Some animals eat plants, others eat other animals Animals ________and store food in their bodies Most animals can ________ from place to place Animals are multicellular organisms Cells are __________ into tissues and __________ that form systems Most animals have a _________, digestive, and ______________ system TWO GROUPS OF ANIMALS Vertebrates animals with __________ fish, ____________, reptiles, birds Invertebrates animals without a _____________ worms, and _______________ SYMMETRY ______________ ARRAINGEMENT OF BODY PARTS AROUND A _____________ OR ALONG A CENTER LINE Two types of symmetry ____________ Bilateral SYMMETRY Radial Body parts are arranged in a __________ around a central ________ Ex. A sea anemone fig 7-1b SYMMETRY Bilateral The body can be ________ ______________ into two equal sides, a right ______ and a left side This includes all vertebrates and some invertebrates The animal must have a ______ and a tail end, and an upper and ______ half REVIEW OF TRAITS 1. 2. 3. 4. Animals can’t make food, they must catch it and eat it Most animals can move from place to place Animals have many cells Most animals have some type of symmetry 9 MAJOR GROUPS OF CLASSIFICATION Sponges, stinging celled animals, 3 worm phyla, softbodied animals, jointed-leg animals, spiny skinned animals, chordates Sponges are the smallest phyla, jointed- leg animals are the largest, refer to fig. 7-2 SPONGES AND STINGING-CELLED ANIMALS Simple ____________ Have pores Do not _______ on their own Live in salt and fresh water Water comes in through the _______ and out through a hole at the ______ center of the body, food from the water gets trapped by food getting cells inside the body SPONGES CONT. ______ cell layers thick Have no muscles or nerve cells No tissues, _________, or organ systems Reproduce ________ or asexually, by egg and sperm, or by budding Sponges are asymmetrical __________ symmetry STINGING-CELLED ANIMALS Animals with __________ cells Hollow sac-like bodies Lack ________ Live in the ocean and in fresh water Examples: jellyfish, _______, sea fan Stinging-celled cont. Have arm-like parts call tentacles that surround the mouth Have _________ symmetry A body cavity contains an opening called the ________ It’s the only way into and out of the body Stinging-celled cont Attach themselves to the ocean bottom with or to rocks with a structure called a disc Do not ______ from place to place How do they catch their food? With their __________ Tentacles contain poison darts that stuns the animal that touches them Food enters through the _________ and undigested food leaves through the ___________ Reproduce sexually and asexually WORMS Worms are ____________ 3 phyla---_____________, _______________, segmented worms FLATWORMS Simplest worms Flat body, 3 layers of cells, ________, middle, and a thick middle layer Most ___________ are parasites Parasites live in or on other living things getting food from them (called the host) TAPEWORM Flat ______________ body divided into sections Live in the __________ of almost any kind of vertebrate Have suckers and _________ that hold onto the sides of the intestine They _________ food that has already been digested TAPEWORM CONT. Tapeworms in humans are not as common as in other countries In the us waste is treated with chemicals at sewage plants Meat is inspected for _______ However always cook your meat well Copy down the life-cycle of a tapeworm into your notes pg 143 ROUNDWORMS Have long bodies with __________ ends ____ layers of cells Some cannot be seen without a microscope Many are __________ Hosts are people, dogs, cats, plants ROUNDWORMS CONT Found in the _______ ____________ are parasites of people, they enter through the skin of the feet, once inside they move to the intestine, and feed on the hosts _________ Refer to figure 7-11 ROUNDWORMS CONT Have long __________ bodies Has a _______ and an ______ (first animal to have a 2 way gut) First animal to have an intestine Males and _________ are separate animals, first animal to have separate sexes SEGMENTED WORMS Bodies divided into sections called __________ 3 cell layers Most __________ of the worms Live in salt water, fresh water and on land Ex: leech, earthworm SEGMENTED WORMS CONT Segments have _________ Have a ________ and an ________ Has an intestine Two blood ___________ 5 pairs of simple ________ that carry oxygen and food to all the cells Has nerves and a simple _________ Separate sexes SOFT-BODIES ANIMALS Soft body protected by a ______ shell Body covered by a thin fleshy tissue called a _______(mantle makes the shell) Have a ____________ foot for moving Have a head with a mouth with _________ 1st CLASS OF SOFT-BODIED ANIMALS Snails and _______ Live on land and in the water ______ using a muscular foot snails(shell) slugs(no shell) Snail has two ___________ (sense organs) Contain eyes that detect light 2nd class Clams, oysters, scallops Have two ________ that fit together Have a muscular foot Live buried in the sand and ________ water to get food 3rd class Octopus, squid, cuttlefish Squid, cuttlefish have ___________ inside their bodies _____________ has no shell Have tentacles surrounding the head Well _____________ eyes Rapid swimmers Features of soft-bodied animals review 1 all are ____________ 2 soft ______ covered by a __________ 3 most have 1 or 2 external ________, or an internal shell 4 most have a ______ by which they ______ about