Chapter 15 Life Science BJU Book B
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| an animal without a backbone | invertebrate
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| this provides mechanical support for muscle attachment and consistent body shape | skeleton
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| they filter water to obtain food (ex. sponges) | filter feeder
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| are in special cells found in the ectoderm, or outer layer, of jellyfish and similar organisms | nematocysts
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| the organism can be divided into equal halves by any plane along the length of the organism | radial symmetry
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| means that there are 2 equal sides to the animal | bilateral symmetry
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| long, thin nerve cells found throughout the body of an animal or human | neurons
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| a collection of neurons wrapped in protective coverings | nerve
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| is an invertebrates "coordination center" and is sometimes called a simple brain | ganglion
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| something an organism can sense | stimulus
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| a structure that can sense a stimulus and then start an impulse traveling along a neuron | sensory receptor
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| a system where the blood never leaves the blood vessels and just circulates throughout the earthworms body | closed circulatory system
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| helps control the earthworms blood pressure | aortic arches
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| a blood vessel that is very tiny; materials are exchanged between the blood and other body tissues in this | capillary
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| a blood vessel that carries blood toward the heart | veins
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| What is the key characteristic of sponges? | Their pores allow water to pass thru their body
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| What two materials may compose a sponge skeleton? | spongin and spicules
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| What material or substance provides support for an animal that has a hydrostatic skeleton? | jelly-like mass; water or some body fluid
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| In what phylum do jellyfish and coral belong? | cnidarian
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| Name the structure that jellyfish use for stinging. | nematocysts
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| Why do hard corals live in relatively shallow depths? | coral have an algae living w/ then & need light for photosynthesis
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| What kind of symmetry do cnidarians have? | radial symmetry
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| What is the name given to the simple brain of an invertebrate such as a planarian? | Ganglion
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| How does a planarian get rid of its waste products? | using flame cells and excretory tubules; indigestible food thru the mouth
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| Name 3 round worms (genus or common name). | Ascaris, hookworms, pinworms or vinegar eels
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| When an earthworm moves, what structures allow it to hold onto the soil? | bristles
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| What do you call the indigestible soil in food that an earthworm expels as waste? | castings
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| What organ removes waste from an earthworms blood? | excretory tubules
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| How do sponges obtain food? | They filter water to obtain food; collar cells help cause the water to flow inward and exit thru the upper opening
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| If you were to cut thru a large massive hard coral, what would you find? | Algae & layers of coral
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| Describe how a planarian eats. | It eats by extending the pharynx thru the mouth and sucking the food into the intestine
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| Why do we not want pets to have tapeworms? | Tapeworms are parasites that affect the animals insides.
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| Since they do not have eyes, how do night crawlers (earthworms that come out at night) know to retreat into their burrows when a light is shined on them? | They have sensory receptors.
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| How are earthworms beneficial to plant growth? | They digest animal matter so that it can be usable for plants to gather nutrients from the soil.
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| All animals are eukaryotic, multicellular, and have true tissues. True or False. | True
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| True or False - An invertebrate is an animal that has no skeleton | False
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| Is a filter feeder | sponge
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| Nematocysts help a jellyfish ______________________ and _________________ itself. | protect / feed
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| Bilateral symmetry is exhibited by a ______________. | planarian
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| Neurons and ganglia are associated with an animals ________________ system. | nervous
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| Ascaris is a ____________________. | roundworm
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| Which of these is not an organ of the earthworms digestive system? A. excretory tubule B. esophagus C. gizzard D. All are digestive organs | excretory tubule
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| An earthworms blood pressure is controlled by 5 pairs of ______________ _________________. | aortic arches
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| hookworm - Common Name | nematoda - Phylum
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| earthworm - common name | annelida - Phylum
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| coral - common name | cnidaria - Phylum
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| sponge - common name | porifera - Phylum
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| tapeworm - common name | platyhelminthes - Phylum
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