Biology Arthropod Powerpoint

7/30/2019 Biology Arthropod Powerpoint

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ArthropodsArthropods are members of the phylum

Arthropoda. It includes insects, crustaceans,arachnids, centipedes, and millipedes.


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Examples

From ants, spiders, cockroaches, caterpillars,butterflies to moths, crabs, shrimp, crayfish tocentipedes and millipedes. Arthropoda is a

large phylum. They span over the entire world,and exist on land, and on water. The classesare Insecta, Arachnida, Crustacea


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Physical Characteristics

Segmented coelomate, bilateral symmetry, anexoskeleton and jointed structures calledappendage. An appendage is a structure that

grows out of the body of an animal. They canbe used for walking sensing feeding andmating. They include animals such as insects,

crabs, centipedes and spiders.


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These are the basic characteristics of Arthropods. Allarthropods from centipedes to crabs all show thesecharacteristics.


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Arthropods have bilateral symmetry, they have one planeof symmetry, being equal on each side. Arthropods alsohave gone through cephalization.


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Reproduction

Arthropods reproduce sexually, which meansthere is an exchange of genetic material. Theyhave male and female sexes that come

together to fertilize an egg. Arthropodicreproduction is extremely like humans.


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This is a picture of a spider and its babies, still in theircocoon. Spiders produce many children at one time.


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Respiration:

They have efficient respiratory structures thatensure rapid oxygen delivery to cells. There arethree types of respiratory structures: gills,

tracheal tubes, and book lungs. Most havetracheal tubes, which are hollow passages thatcarry air throughout the body. Arachnids

generally have book lungs, which are air filledchambers in the organism. Most aquaticarthropods have gills.


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Arthropods have a very extensive respiratory system. whilewe only have two lungs and one trachea, arthropods havemany multiple air sacs, and a large system of tracheae.Aquatic arthropods have gills on their external epidermis(skin). They look like raised bumps.


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Feeding

Arthropods can include herbivores, carnivoresand omnivores. There are bloodsuckers filterfeeders and parasites. There mouthparts have

evolved in such a way that allows them to eatclose to nearly any food imaginable. Theirmouthparts range from pincers to fangs to jaws

that can cut through tissue of captured prey.


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This is an example of an arthropod eating. All arthropods are heterotrophic, asthey are animals.


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Circulation:

Arthropods generally have a well developedcirculatory system. A heart pumps bloodthrough arteries that branch and enter tissues.

Blood leaves the blood vessels and movesthrough cavities. The blood then collects in alarge cavity around the heart. From there it re-

enters the heart and is pumped around the restof the body.


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This is a comparison of the circulatory system betweenArthropods and Nematodes. As you can see the arthropodhas an open circulation, meaning that blood is pumpedopenly into cavities where it then diffuses back to the heart.


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Excretion:

Most arthropods dispose of wastes usingMalpighian tubules. Which are saclike organsthat extract wastes from the blood and then add

them to digestive wastes that move through thegut. In aquatic arthropods diffusion movescellular wastes from the arthropods body into

surrounding water.


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This is an example of arthropodic excretory systems. Youcan see we have somethings in common with arthropods,but we are still very different. You can also see evidence of

a coelem on the picture.


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Range:

The arthropods range exists across the entireworld. Arthropods can live on both water andland. Because of the quantity of the phylum and

it's large variation between species, arthropodshave been able to spread to all areas on earthexcluding the deep ocean.


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Importance to the World:

Arthropods are important in the world becausethey provide an important part to the food chainand the reproduction of other organisms. The

insects in the phylum help flowers to participatein cross-pollination. This helps germinate ourfood that we eat. Many types of crustaceansare eaten by the human population, includingcrabs, shrimp, and crayfish. Since arthropodsare in the middle of the food chain, many otheranimals depend on them for survival.


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This is an example of a human (and yummy) use ofarthropods.


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Arthropods are extremely variable creatures even withintheir own class and family.


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Fun Facts:

Ancestral arthropods were the first landanimals.

Arthropods are a highly successful group of

animalsthey account for over threequarters of all currently known living andfossil organisms.

They comprise over 90% of the animalkingdom.

http://animals.about.com/od/arthropods/a/tenfactsarthropods.htmhttp://www.reference.com/motif/science/fun-facts-about-arthropods

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Biology Arthropod Powerpoint