Term
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Definition
| animals that DO NOT have a backbone |
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Term
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Definition
| how an animal's body parts are arranged |
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Term
| What are the 3 types of symmetry? |
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Definition
bilateral-when 2 sided of the body mirror each other
radial-when body parts are arranged around a center (like spokes on a wheel)
asymmetrical-when animals have no specific body plan |
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Term
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Definition
| special tissues that make fibers that allow animals to sense their environment |
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Term
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Definition
| a concertrated mass of nerve cells |
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Term
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Definition
| a pouch where good is broken down into small particles |
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Term
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Definition
| the body cavity that surrounds the gut |
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Term
| What are the 9 phyla of animals? |
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Definition
| sponges, cnidarians, flatworms, roundworms, annelid worms, mollusks, arthropods, echimoderms, and chordates |
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Term
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Definition
| the simplest invertebrates that are asymmetrical, have no tisues, gut, or neurons |
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Term
| Why aren't sponges considered to be plants if they can't move? |
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Definition
| because they can not make their own food |
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Term
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Definition
| they filter food out of the water |
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Term
| How can some animals use regeneration to reproduce? |
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Definition
| when a part of an animal can become a whole new animal |
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Term
| How do sponges reproduce? |
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Definition
| sponges can use regeneration and can also reproduce sexually |
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Term
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Definition
| animals that have radial symmetry, complex tissues, a gut, and a simple network of nerve cells |
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Term
| What are the two body forms of cnidarians? |
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Definition
medusa-a bell-shaped form that can swim
polyp-a vase shaped form that is attached to a surface |
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Term
| How do cnidarians get food? |
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Definition
| they have tentacles with stinging cells |
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Term
| What are the three majoor classses of cnidarians? |
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Definition
Hydrozoans (hydra)-most of life is spent as a polyp
jellyfish-spend most of life in medusa form
sea anemones and corals-spend most of life as polyps |
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Term
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Definition
| worms with bilateral symmetry, eyespots,and sensory lobes |
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Term
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Definition
| bumps on each side of the head that are used for detecting food |
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Term
| What are the 3 main groups of flatworms? |
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Definition
planarians-flatworms that are predators and have a brain
flukes-parasitic flatworms
tapeworm-parasitic flatworms with no gut |
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Term
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Definition
| an organism that invades and feeds on another living organism |
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Term
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Definition
| an organism that provides food and a home for a parasite |
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Term
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Definition
| worms with long slim round bodies, bilateral symmetry, and a simple nervous system |
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Term
| What are three examples of roundworms? |
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Definition
| pinworms, hookworms, trichinella |
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Term
| What are the three classes of mollusks? |
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Definition
1)gastropods-most have 1 shell (snail & slug)
2)bivalves-have 2 shells (clam & oysters)
3)cephalopods-have no shell but a large well-developed head and tentacles (octopuse & squids) |
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Term
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Definition
| a tongue-like organ with rows of teeth that gastropods use for scraping food off of rocks |
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Term
| What are the two kinds of circulatory systems? |
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Definition
1)Open-heart pumps blood into spaces in the animal's body
2)closed-heart pumps blood through a network of blood vessels that form a closed loop |
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Term
| What are some characteristics of all mollusks? |
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Definition
1)have a complex ganglia
2)have a circulartoy system
3)have a muscular foot
4)have a visceral mass (group of organs)
5)have a mantle (layer of tissue that covers visceral mass) |
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Term
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Definition
| segmented worms with bilateral symmetry, a complex nervous system with a brain and a closed circulartory system |
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Term
| What are the three major groups of annelids? |
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Definition
1)earthworms
2)marine worms
3)leeches |
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Term
| What are two ways that earthworms help gardens? |
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Definition
1)castings help make soil richer
2)tunnels allow air and water to reach deep into soil |
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Term
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Definition
| wastes left by earthworms |
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Term
| What are two ways doctors use leeches to help people? |
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Definition
1)prevent swelling near a wound
2)prevent or dissolve blood clots |
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Term
| What percent of all animal species are arthropods? |
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Definition
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Term
| What 4 characteristics do arthropods share? |
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Definition
1)have segmented bodies with specialized parts
2)have jointed limbs
3)have an exoskeleton
4)have a well-developed nervous system |
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Term
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Definition
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Term
| What are the 4 jobs of an exoskeleton? |
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Definition
1)support the body
2)allows the animal to move
3)pretects internal organs
4)keeps body from drying out |
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Term
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Definition
| an eye made of many identical light-sensitive units |
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Term
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Definition
| a feeler that can sense touch, taste, or smell |
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Term
| How are arthropods classified into groups? |
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Definition
| by the kind of body parts they have |
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Term
| What are the 4 groups of arthropods? |
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Definition
1)centipedes and millipedes
2)crustaceans
3)arachnids
4)insects |
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Term
| What are some characteristics of centipedes and millipedes? |
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Definition
| have one pair of antennae, a hard head, and mandibles |
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Term
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Definition
| mouth parts that can pierce and chew food |
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Term
| How do you tell the difference between centipedes and millipedes? |
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Definition
| centipedes have 1 pair of legs per segment and millipedes have 2 pairs of legs per segment |
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Term
| What are some characteristics of crustaceans? |
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Definition
| have gills, mandibles, 2 pair of antennae, 10 legs, and 2 compound eyes on stalks |
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Term
| What are some examples of crustaceans? |
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Definition
| shrimp, baracles, crabs, lobsters, crayfish, waterfleas |
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Term
| What are some characteristics of arachnids? |
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Definition
| have no antenna, have 4 pairs of legs, have 2 body regions |
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Term
| What are some examples of arachnids? |
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Definition
| spiders, scorpions, and ticks |
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Term
| What are the 3 characteristics of insects? |
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Definition
| have 3 main body regions, 6 legs, and 2 antennae |
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Term
| What are some examples of insects? |
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Definition
| fly, mosquito, beetles, termites, butterflies, ants |
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Term
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Definition
| phase in like cycle of many animals during which a rapid chage from immature to an adult takes place |
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Term
| What are the 4 stages of complete metamorphosis? |
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Definition
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Term
| What are the 3 stages of incomplete metamorphosis? |
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Definition
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Term
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Definition
| the process where an animal sheds its exoskeleton |
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Term
| What are 6 characteristics of echinoderms? |
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Definition
1)have a spiny skin
2)live in the ocean
3)have an endoskeleton
4)have radial symmetry as adults
5)have a nerve ring
6)have a water vascular system |
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Term
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Definition
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Term
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Definition
| a series of canals filled with fluids that help animals move, eat, breathe, and sense their environment |
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Term
| What are the 5 major classes of echinoderms? |
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Definition
1)sea stars
2)brittle stars and basket stars
3)sea urchins and sand dollars
4)sea lilies and feather stars
5)sea cucumbers |
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Term
| How many invertbrates have been named? |
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Definition
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Term
| Some invertbrates eat food through their mouths. Others absorb food through their ______. |
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Definition
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Term
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Definition
| hole on top of the sponge that allows water to leave a sponge. |
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Term
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Definition
| hard fibres that make up the sponge's skeleton |
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Term
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Definition
| holes outside of a sponge's body that allow water to flow into a sponge |
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Term
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Definition
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Term
| List two functions of neurons. |
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Definition
| sense their enviornment and carry messages around the body to control an animal's actions |
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Term
| A characteristic that defines cnidarians as a group is thier _____ |
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Definition
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Term
| What distingusishes flatworms from other kings of worms? |
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Definition
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Term
| How many roundworms can live in a single rotten apple? |
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Definition
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Term
| What kind of roundworm can be passed to people from infected pork? |
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Definition
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Term
| Uses tentacles to grab food |
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Definition
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Term
| Uses gills to filter food |
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Definition
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Term
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Definition
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Term
| All mollusks have complex ________ to control breathing, movement, and digestion. |
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Definition
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Term
| Of all invertevrates, Octopuses and squids have the most advanced ______. |
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Definition
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Term
| name the two mollusks that have closed circulatory systems. |
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Definition
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Term
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Definition
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Term
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Definition
| includes the gills, guts, and other organs |
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Term
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Definition
| a layer of tissue that covers the visceral mass |
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Term
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Definition
| protects some mollusks from predators |
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Term
| Annelid worms are often called |
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Definition
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Term
| How many segments do earthworms have |
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Definition
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Term
| What are marine worms covered with? |
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Definition
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Definition
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Definition
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