Arthropods Molly, Isaiah, Holly, Sean. Body Symmetry Bilateral al-kingdom.html.

Arthropods Molly, Isaiah, Holly, Sean

Body SymmetryBilateral

http://biologytricks.blogspot.com/2012/05/animal-kingdom.html

LocomotionSegmented legsSome have wingsAre adapted to live in almost any

habitat◦Aquatic, terrestrial, air

Smooth muscles

Nervous SystemDorsal brain and ventral nervous

cordChains of ganglia serve various

parts of bodyThe brain is made of 3 parts

Digestive SystemOne wayHave digestive glands

◦Special because not present in many organisms

Excretory SystemPresent Malphigian tubules

◦Projections of the digestive tract◦Help conserve water

Circulatory SystemDorsal vesselOpen systemAlary muscles on each side of

chamberPeristaltic contractions move

hemolymphhttp://www.cals.ncsu.edu/course/ent425/tutorial/circulatory.html

Respiratory SystemSpiracles in exoskeletonFlap like valvesTracheal trunk and tubesTracheole acts as a filter

http://www.cals.ncsu.edu/course/ent425/tutorial/respire.html

http://www.cals.ncsu.edu/course/ent425/tutorial/respire.html

Skeletal SystemExoskeleton

◦Provides a lot of space for movement (joints, anchor for muscles and appendages)

◦Provides protection◦Composed of chitin

Other species exoskeletons are composed of lipids, proteins, and calcium carbonate

Skeletal System (Con’t)Allows for very little growth

◦Forces organism to molt (shed)After exoskeleton molts the

organism is exposed and vulnerable until new shell hardens

After molt the organism often hides for protection ◦metabolism slows down during hiding

Reproductive systemSeparate sexes (male and

female)Gonads connected directly to

ducts located on the ventral surface of the trunk

Sperm is transferred to female within seal packets called spermatophores

Reproductive Sys.(Con’t)Spermatophores

◦Little containers of sperm◦Not diluted in aquatic areas◦Sometimes deposited directly in the

female◦Some insect or arachnids deposit on

ground and leave a chemical signal to attract the female

Class: CrustaceansCrabs, lobsters, shrimp, wood liceGenerally aquatic5 pairs of legsCrush prey with claws

Class: CentipedesOne pair of legs per segmentNickname: “hundred-leggers”PoisonousHunters

◦Vomit on their prey to liquefy them

Class: Millipedes2 pairs of legs per segmentNickname: “thousand-leggers”Scavenge for decaying plant

material, leaves, etc◦Detrivores

Non-poisonous

Class: ArachnidsSpiders, scorpions, mites2 body segments8 legsCarnivorous

◦Feed on predigested bodies of insects and other small animals

◦Drink the blood and insides

Class: InsectsExamples: Flies, bees, antsThree body segments

◦Head◦Thorax ◦Abdomen

Six legs

Phun Phylum PhactsCompound eyesTough exoskeleton made of chitinCalled “joint-legged” because

they have segmented legs84% of animals are arthropods

Works Cited Barnes, Robert D. "Arthropod (animal Phylum)." Encyclopedia

Britannica Online. Encyclopedia Britannica, n.d. Web. 03 Oct. 2014.

Barnes, Robert D. "Reproductive System and Life Cycle." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.

"CIRCULATORY SYSTEM." Circulatory System. N.p., n.d. Web. 03 Oct. 2014

"RESPIRATORY SYSTEM." Respiratory System. N.p., n.d. Web. 03 Oct. 2014.

Yeh, Jennifer, "Arthropoda." The Columbia Encyclopedia, 6th Ed.. 2014, "Arthropods." UXL Encyclopedia of Science. 2002, Richard Robinson, "arthropod." A Dictionary of Biology. 2004, Michael Allaby, AILSA ALLABY;MICHAEL ALLABY, "arthropod." World Encyclopedia. 2005, "arthropod." The Oxford Pocket Dictionary of Current English. 2009, and "arthropod." Oxford Dictionary of Rhymes. 2007. "Arthropoda." Encyclopedia.com. HighBeam Research, 01 Jan. 2002. Web. 03 Oct. 2014.