PPT-Crayfish pulling water over its gills and out its mouth!

. DISSECTION. . Animal Groups. Image from: http://ology.amnh.org/biodiversity/treeoflife/pages/graph.html. ARTHROPODA. “Arthro” = jointed. “pod” = foot. Arthropods. Structures. to identify in lab. Crayfish Study. Scenario:. We are Biological Technicians for National Park Service at Lake Roosevelt National Recreation Area. Part of our job is to help with the Crayfish Inventory and Monitoring Program. For this study our duties will be to set and take in the crayfish traps as well as collecting and analyzing the data.. Prelab. 2010. United streaming: crayfish 10:44.  . Youtube. - crayfish external anatomy. http://www.youtube.com/watch?v=rZ-7LF5AkGs. 6.21.  . internal. http://www.youtube.com/watch?v=rpkiNLhCBMU&feature=related. Why are they called bivalves?. The . shells of a bivalve are made up of two halves that are mirror images of each other and are joined at one edge by a flexible . hinge.. Each . half is asymmetrical and rounded, so that when . Are changes in physical forms or behaviors brought about by natural selection that enable an organism to better survive in its natural habitat.. Many adaptations have to do with getting food and oxygen, moving or staying in one place. What is Oil Pulling. Instruction on Oil Pulling. Important Notice. How Does Oil Pulling Work. Health Benefits. Oil Pulling Dental Innovation. References. By: Kim Le & Sara Scarborough . Dental Hygiene Students at. Brian Helms. 1. and Jim Stoeckel. 2. 1. Department of Biological Sciences. 2. School of Fisheries, Aquaculture, and Aquatic Science. Auburn University, AL 36849. Role of crayfishes in ecosystems. Consumers. Video: . https://www.youtube.com/watch?v=3vENk9QPp4M. Crustaceans. All Arthropods have:. Exoskeleton. Jointed legs. Source: https://www.thoughtco.com/subphylum-crustacea-crustaceans-1968439. Crustaceans Basics. General Characteristics of Mollusks. 2nd . largest animal phylum ~100,000species. Extremely . diverse, so why are they all classified under the same phylum?. 1) They all start off as a TROCHOPHORE. This . Characteristics of Mollusks. Mollusks are invertebrates with soft, . unsegmented. bodies that are often protected by a hard outer shell.. They also have a thin layer of tissue called a . mantle. that covers its internal organs.. Subphylum Vertebrata: . Vertebrae surround nerve cord and serves as a primary . support. ; skeleton modified . into . a skull for protection of the brain. .. This group includes . fish, amphibians, reptiles, birds, and mammals. Sarah Schieffer, Nicole Bauer, Brandon . Urhammer. , Sarah Bartholomew . Faculty Mentor: Todd Wellnitz, Biology Department. Percent of Rusty Crayfish. Non . sampled . lakes. 0%. 1-40%. 41-80%. 81-100%. Barbara Leary and Amy . Vallis. AP Biology. Ms. Bergman. April 8, 2011. BODY STRUCTURE AND COVERING. BONY FISH (. Teleosts. ). Scales are flatter covered by thins layers of skin and mucus making them slippery. ALLIED CHE&BOT.  Digestion in the mouth. Little physical digestion occurs in the mouth as most sharks swallow their food whole or in very large pieces. Food goes down the short and wide . esophagus.