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Biology module 12

module 12 study guide

TermDefinition
Exoskeleton A body covering, typically made of chitin, that provides support and protection
Molt To shed an old outer covering so that it can be replaced with a new one
Thorax The body region between the head and the abdomen
Abdomen The body region posterior to the thorax
Cephalothorax A body region composed of the head and thorax fused together
Compound eye An eye made of many lenses, each with a very limited scope
Simple Eye An eye with only one lense
Open circulatory system 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
Statocyst SThe organ of balance in a crustacean
Gonad A general term for the organ that produces gametes
Complete metamorphosis Insect development consisting of four stages: egg, larva, pupa, and adult
Incomplete metamorphosis Insect development consisting of three stages: egg, nymph, and adult
Name the five common features of athropods. Exoskeleton, body segmentation, jointed appendages, open circulatory system, and a ventral nervous system are the common features of arthropods.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. a. Blood collects in the pericardial sinus, and it enters the heart through one of three openings in the heart’s surface. Each opening has a valve that closes when the heart is ready to pump.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. b. Once it absorbs the blood and closes these valves, the heart pumps blood through a series of blood vessels that are open at the end. These vessels dump directly into various body cavities.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. c. Gravity causes the blood to fall into the sternal sinus, where it is collected by blood vessels that are open at one end.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. d. Unlike the blood vessels that dump the blood into the body cavities, these vessels carry the blood back towards the pericardial sinus.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. e. 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.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. f. The blood also passes through green glands, which clean it of impurities and dump those impurities back into the surroundings.
Explain the flow of blood in a crayfish, starting from the pericardial sinus. g. Once the blood has passed through the gills and the green glands, it then makes its way back to the pericardial sinus to begin the trip all over again.
What purpose does the green gland serve? It cleans the blood of impurities.
What structures (besides the gills and gill chamber) are vitally important for respiration in a crayfish? The swimmerets and maxillae are important. Without them, fresh, oxygen-rich water would not enter the gill chambers.
What happens when a crayfish loses a limb? The injury gets sealed off to prevent bleeding, and then a new limb regenerates.
Where do the fertilized eggs of a crayfish go? They are attached to the swimmerets.
Why do arthropods molt? They molt because their exoskeletons get too small for their growing bodies.
What two appendages are responsible for taste and touch in a crayfish? The antennules and antennae are responsible for taste and touch.
What five characteristics set arachnids apart from the other arthropods? Four pairs of walking legs, two segments in body, no antennae, book lungs, four pairs of simple eyes.
What are the three basic types of webs that spiders spin? A. a single, flat sheet of sticky silk. B. tangle webs that have no real discernible pattern. C. concentric circles of sticky silk that are supported by “spokes” of non-sticky silk.
Do all spiders use their silk to spin webs? no
Why are the spider’s lungs called book lungs? The lung has many thin layers that look like the pages of a book.
What four characteristics set insects apart from the other arthropods? Three pairs of walking (or jumping) legs, wings, three segments in body, one pair of antennae.
Why don’t insects have respiratory systems? Insects do not need respiratory systems because of a complex network of tracheas that allow air to travel throughout the body.
If an insect goes through a pupa stage, does it perform complete metamorphosis or incomplete metamorphosis? complete metamorphosis.
What four types of wings exist among insects? membranous wings, scaled wings, leather-like wings, and horny wings.
Indicate the order of Insects with two leather-like wings and two membranous wings Orthoptera
Indicate the order of Social insects with membranous wings Hymenoptera
Indicate the order of Insects with two membranous wings and two membranous balancers Diptera
Indicate the order of Insects with two horny wings and two membranous wings Coleoptera
Indicate the order of Insects with scaled wings Lepidoptera
Created by: abigaileah