Biology Module 12

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Exoskeleton
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A body covering, typically made of chitin, that provides support and protection
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Molt
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to shed an old outer covering so that it can be replaced with a new one
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Thorax
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The body region between the head and the abdomen
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Abdomen
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The body region posterior to the thorax.
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Cephalothorax
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a body region composed of the head and thorax fused together
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Compound Eye
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An eye made of many lenses, each with a very limited scope
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Simple Eye
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An eye with only one lens
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Open Circulatory System
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a circulatory system that allows the blood to flow out of the blood vessels and into various body cavities so that the cells are in direct contact with the blood
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Statocyst
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the organ of balance in a crustacean
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Gonad
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A general term for the organ that produces gametes
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Complete Metamorphosis
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Insect development consisting of four stages: egg, larva, pupa, and adult
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Incomplete Metamorphosis
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insect development consisting of three stages: egg, nymph, and adult
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What does the green gland do?
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cleanses the blood of impurities.
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Insect order with two leather-like wings and two membranous wings.
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Orthoptera
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Social insect order with membranous wings.
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Hymenoptera
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Insect order with two membranous wings and two membranous balancers.
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Diptera
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Insect order with two horny wings and two membranous wings.
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Coleoptera
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Insect order with scaled wings
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Lepidoptera
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Identify the structures on #3, study guide module 12
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See Solutions
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Identify the structures on #4, study guide module 12
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See Solutions
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Name the five common characteristics among the arthropods.
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1. exoskeleton 2. body segmentation 3. jointed appendages 4. open circulatory system 5. ventral nervous system
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Explain the flow of blood in a crayfish.
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1. Blood collects in the pericardial sinus, which processes it through heart. 2. The heart takes the blood and sends it through "broken" blood vessels, which dump it into body cavities. - the blood falls through the gills, getting more oxygen. -the blood falls through the green glands, which cleanse it. 3. the blood finally falls into more broken blood vessels, which are attached to the organs the blood will go to.
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What structures (besides the gills and the gill chamber) are vitally important for respiration in a crayfish?
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1. swimmeretes 2. maxillae
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What happens when a crayfish loses a limb?
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1. The injury is sealed off to prevent bleeding 2. A new limb regenerates
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What two appendages are responsible for taste and touch in a crayfish?
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1. antennules 2. antennae
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What five characteristics set arachnids apart from other arthropods?
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1. four pairs of walking legs 2. two segments in body 3. no antennae 4. book lungs 5. four pairs of simple eyes
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What are the three basic types of webs that spiders spin?
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1. Sheet web 2. Tangle web 3. Orb web
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What four characteristics set insects apart from the other arthropods?
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1. Three pairs of walking (or jumping) legs 2. Three segments in body 3. One pair of antennae
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What four types of wings exist among insects?
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1. Membranous wings 2. Scaled wings 3. Leather-like wings 4. Horny wings
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Where do the fertilized eggs of a crayfish go?
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They are attached to the swimmeretes.
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Why do arthropods molt?
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They molt because their exoskeletons are two small for their growing bodies.
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Why are the spiders lungs called book lungs?
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The lung has many thin layers that look like pages of a book.
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Why don't insects have respiratory systems?
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They have a complex network of tracheae that allow air to travel throughout the body instead.
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Do all spiders use their silk to spin webs?
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No
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If an insect goes through pupa stage, does it perform complete metamorphosis or incomplete metamorphosis?
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Complete Metamorphosis.
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