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20 Cards in this Set
- Front
- Back
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Name the 5 common characteristics among the arthropods.
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exoskeleton, body segmentation, jointed appendages, open circulatory system, and a ventral nervous system
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Study FIGURE 12.2
AND Study FIGURE 12.4 and be able to name the parts |
a. antennae, b. antennules, c. cephalothorax, d. abdomen, e. telson, f. uropods, g. swimmerets, h. carapace, i. walking legs, j. chelipeds
12.4 - a. eye, b. brain ganglia, c. stomach, d. gonad, e. heart, f. percardial sinus, g. intestine, h. anus, i. nerve chord, j. digestive glands, k. sternal sinus, l. mouth, m. esophagus, n. green gland |
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(PART #1) Explain the flow of blood in a crayfish starting from the pericardial sinus until the valve closes...then part #2
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Blood collects in the PERICARDIAL SINUA - it enters the HEART through one of the 3 openings in the heart's surface. Each opening has a valve that closes when the heart is ready to pump. Once it ABSORBS the blood and CLOSES THESE VALVES...
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What purpose does the green gland serve?
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It cleans the blood of impurities.
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What structures (besides the gill and gill chamber) are vitally important for respiration in a crayfish?
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The swimmerets and maxillae are important. Without them, fresh, oxygen-rich water would not enter the gill chambers.
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What happens when a crayfish loses a limb?
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The injury gets sealed off to prevent bleeding, and then a new limb regenerates.
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Where do the fertilized eggs of a crayfish go?
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They are attached to the swimmerets.
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Why do arthropods molt?
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They molt because their exoskeletons get too small for their growing bodies.
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What two appendages are responsible for taste and touch in a crayfish?
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The antennules and antennae are responsible for taste and touch.
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What 5 characteristics set arachnids apart from the other arthropods?
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Four pairs of walking legs, two segments in body, no antennae, book lungs, four pairs of simple eyes.
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What are the three basic types of webs taht spiders spin?
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SHEET WEB
TANGLE WEB ORB WEBS |
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Do all spiders use silk to spin webs?
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No - some spiders spin silk to make trap doors, and some even fire their silk like a projectile.
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Why are the spider's lungs called book lungs?
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The lung has many thin layers that look like the pages of a book.
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What 4 characteristics set insects apart from the other arthropods?
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Three pairs of walking (or jumping) legs
WINGS 3 SEGMENTS IN BODY 1 PAIR OF ANTENNAE |
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Why don't insects have respiratory systems?
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Insects do not need respiratory systems because of a complex network of tracheas that allow air to travel throughout the body.
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If an insect goes through a pupa stage, does it perform complete metamorphois or incomplete metamorphosis?
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The pupa stage only exists in COMPLETE METAMORPHOSIS.
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What 4 types of wings exist among insects?
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membranous wings
scaled wings leather-like wings horny wings |
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Match the orders listed below with the descriptions listed in each letter:
HYMENOPTERA, LEPIDOPTERA, COLEOPTERA, DIPTERA, ORTHOPTERA a. insects with two leather-like and two membranous wings b. social insects with membranous winggs c. insects with two membranous wings and two membranous balancers d. insects with two horny wings and two membranous wings e. insects with scaled wings |
a. orthoptera
b. hymenoptera c. diptera d. coleoptera e. leidoptera |
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PART #2 - blood vessels to pericardial sinus...
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the heart pumps the blood through a series of BLOOD VESSELS that are open at the end. These vessels dump directly into various BODY CAVITIES. GRAVITY causes the blood to fall into the STERNAL SINUS, where it is collected by blood vessels that are open at one end. Unlike the blood vessels that dump the blood into the body cavities, these vessels carry the blood back towards the PERCARIDAL SINUS...then part #3
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Part #3
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On its way there, the blood is passed through the GILLS where it can release the CARBON DIOXIDE it has collected and pick up a fresh supply of oxygen. The blood also passes through GREEN GLANDS which clean it of impurities and dump those impurities back into the surroundings. Once the blood has passed throug the gills and the green glands, it then makes its way back to the PERICARDIAL SINUS to begin the trip all over again.
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