DOC PREVIEW
UAB BY 124 - Coelomates Continued

This preview shows page 1-2 out of 7 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 7 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 7 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 7 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

BY 124 1st Edition Lecture 10Outline of Last Lecture Chapter 33I. Kingdom PoriferaII. Phylum Cnidaria III. Phylum CtenopheraIV. Acoelomatesa. Phylum PlatyhelminthesV. Pseudoacoelomatesa. Phylum Rotiferab. Phylum NematodaVI. Coelomatesa. Phylum NemerteaOutline of Current Lecture Chapter 33Coelomates (cont.)I. Phylum NemerteaII. Phylum LophophoraIII. Phylum Mollusca IV. Phylum AnnelidaV. Phylum Tardigrada VI. Phylum ArthropodaCurrent LectureChapter 33 (cont.):COELOMATESCoelomatesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.I. Phylum Nemertea (commonly called proboscis/ribbon worms)a. coelomate classification is just up for questionb. differs from flatworms in 2 major waysi. one-way digestive systemii. simple circulatory systemII. Phylum Lophophorata i. Filter feeders a. Class _____________ (ectoprocts)i. Don’t need to know these for test b. Class Brachiopoda (Brachiopods)a. Look like mollusksb. Used to be most common creature in ocean (according to fossils) but now there aren’t as many III. Phylum Mollusca i. 2nd largest group all of animals, 2nd most speciesii. All look kinda differentiii. Have real organsiv. Characteristics of all Molluscs (Figure 33.15)1. Visceral mass – sits above foot and holds most of organs2. Foot – muscular thing that allows it to move3. Mantle – lies right under the shell; heavy fold of tissue that covers VM and in many species it contains glands that secrete a shell.4. Radula – belt of “teeth”; allows them to grind fooda. Only one group does not have this structureb. Class Polyplacophora (Figure 33.16)i. Only shell has segments, body does not1. Shell has 8 platesii. Called chitons iii. Open circulatory system 1. Long tube goes along body and has openings (sinuses) that allow blood to move into cellsiv. No headv. Marinec. Class Gastropoda (snails and slugs) (figure 33.18, )i. “Stomach-foot”ii. Lost gills (started off as marine)1. Vascularized mantle to get oxygen because do not have true lungsiii. Undergo torsion – a twisting of the visceral mass1. When larva starts to develop, organs twists 180 degrees which results in the anus being above the headiv. Eat layers of leaf until they go all the way throughv. Pouring salt on slugs makes them froth up and died. Class Bivalva (clams, scallops, oysters)i. No radula1. Feed by suspension/filter feedinga. Like spongesb. Water comes in and leaves via siphonc. Could be bad because they can accumulate bacteria or heavy metals which is toxic to humans if eaten rawii. Some can “create” pearls1. Now you can really only get cultured pearlse. Class Cephalophoba (squids, octopuses, cuttlefishes, etc)i. “Head- foot”ii. Some have shells, some don’tiii. Only mollusk that has a closed circulatory systemiv. Oldest representative – Chambered nautilus (Figure 33.21)1. Has a shell that lots of people like a. Endangered because of thisv. Octopuses and squids are considered most intelligent invertebrates1. Very well-developed eye2. Ink sac that stains water and distracts prey3. Very fluidvi. Largest invertebrate – giant squid1. 18 m long and weigh 2 tons2. Eaten by whalesvii. Cuttlefish can change colors1. If male wants to attract female, he “flashes” his colors and female likes that.a. Uses chromatophores (Also found in octopuses and squids that change color)b. only flash on one side so half flashes and attracts female while other half doesn’t which keeps him from getting attackedIV. Phylum Annelidai. “Ring”ii. First group of animals that are segmentedb. Class Oligochaeta (most worms)i. Reduced headii. Marine and freshwateriii. Figure 33.2441. Body segments all contain same organs2. Metanephridium – their kidney structure3. Chaetae – help “pull” them alonga. Longitudinal and circular musclesiv. Breathe across their skin so need moisture but not too muchv. Hermaphroditicc. Class Polychaeta (mostly marine segmented worms)i. Some are free-livingii. Parapodia – “almost foot”1. Used for movement and for breathingiii. Some live in tubes1. How do they know when to mate?a. One night a year, a packet of eggs or sperm will be released and will break in water and then will fertilize d. Class Hirudinea (leeches)i. Body is usually flattenedii. No appendagesiii. Have anti-coagulant called hirudin that they use to keep prey from clotting whenfeeding 1. Also inject an anesthetic to allow for lancet to penetrate you without you knowingV. Phylum Tardigrada (don’t need to know much of this phylum)a. “water bears”VI. Phylum Arthropodai. 1st highest number of species1. Insects and other animalsii. “jointed- foot”1. Mouth parts2. Feet3. Reproductive structures fir transporting sperm4. Swimmingiii. Most have exoskeleton1. Need to molt to grow2. Moisture retention3. Supportiv. Open circulatory systemv. Segmentedvi. Gills for breathing if live in watervii. Tracheal systems if live on land1. Similar to AC system in house – ducts move from “room” to “room” and air moves throughout bodya. Doesn’t use blood to transport oxygen like we doviii. Malpighian tubules – extension of gut that allows for waste removal1. Nitrogenous waste is transferred to gut using these tubules and waste comes out with fecal material2. Water animals in this phylum use “green glands”ix. Separate sexesx. Internal fertilizationb. Subphyum Cheliceriformes (horshoe crabs, scorpions, mites, ticks, spiders)i. Pincher/ claw- like mouth parts that replace first pair of walking legs called cheliceraeii. Body will be fused into an anterior cephalothorax (head and thorax) and an abdomeniii. No antennaeiv. Spiders have glands that help them make silk for webs1. Class Arachnida a. Arachnea – “weaving”2. Spider toxins cause severe necrosisc. Subphyum Myriapoda (millipedes and centipedes)i. Milli – 10001. 2 pair of legs per segment2. herbivoresii. Centi – 1001. 1 pair of legs per segment2. Carnivoresiii. Some of first creatures on landiv. Antennae d. Subphyum Hexapoda (insects, springtails)i. Body divided into head, thorax and abdomenii. Antennae iii. Can have wings1. Usually 2 pairiv. Have mandibles not cheliceraev. Some can flyvi. Wings are not appendagesvii. Metamorphosis1. Beneficial because they do not have to compete viii. Grasshoppers go through incomplete metamorphosis1. Just get bigger and grow wings and reproduceix. Figure


View Full Document

UAB BY 124 - Coelomates Continued

Download Coelomates Continued
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Coelomates Continued and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Coelomates Continued 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?