TAMU ENTO 208 - General Overview of Arthropods (3 pages)

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General Overview of Arthropods



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General Overview of Arthropods

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Overview of the Phylum Arthropoda and the organisms in it


Lecture number:
2
Pages:
3
Type:
Lecture Note
School:
Texas A&M University
Course:
Ento 208 - Veterinary Entomology
Edition:
1

Unformatted text preview:

ENTO 208 1st Edition Lecture 2 Outline of Lecture 1 I Syllabus a Can be found on eCampus under the Syllabus tab II Intro to Instructor Gabriel Gabe Hamer III Intro to Entomology a Classification organization b Arthropods Outline of Lecture 2 I Phylum Arthropoda II Arthropod Classes a Crustacea b Diplopoda c Chilopoda d Arachnida e Insecta Lecture 2 I Phylum Arthropoda a External characteristics 10 i Bilateral symmetry ii Complete digestive system connected mouth and anus 1 Some species have developed conservative systems so they do not expel waste through an anus iii Excretion 1 Malpighian tubules function like kidneys in mammals iv Circulatory System 1 Open haemocoel hemolymph filled body cavity a Is blue in horseshoe crabs harvested to be used as a dye that highlights foreign material ie bacteria v Respiration 1 Spiracles small openings on the surface of the individual that allow air to enter the trachea 2 Trachea carries oxygen to system These 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 II vi Nervous System 1 Ventral nerve cord dorsal in humans vii Most use sexual reproduction 1 Some aphids can undergo parthenogenesis Arthropod Classes a Crustacea i Crabs lobster shrimp pill bugs copepods daphnia ii 2 pairs of antennae 5 or more pairs of legs 2 body regions cephalothorax abdomen iii Food source important host for many parasites 1 Ex guinea worm classified as a neglected tropical disease b Diplopoda i Millipeds ii 1 pair antennae many legs 2 body regions head body 1 Two pairs of legs per body segment iii No sting or bite plant pest intermediate host for parasites c Chilopoda i Centipedes ii Many legs 2 body regions head body 1 One pair of legs per body segment iii Fangs with poison glands some species are dangerous to animals including humans house centipede are harmless to humans d Arachnida i No antennae 4 pairs of legs 2 body regions cephalothorax abdomen ii



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