Well, I could give you a basic overview.
Earthworms, as biologists know them, belong to phylum Annelida, which literally comes from "annulus," meaning rings. (Keep in mind that "phylum" is just another way to say group. Biologists categorize animals based on certain characteristics that share a common similarity. So, don't pay too much attention to the word "phylum". I'm just giving you some information on their "taxonomy," or group names). Anatomically speaking, the annelid is the first phylum to display a complete digestive system in the animal kingdom, where a mouth leads to a crop, gizzard, intestinal tract and leaves the worm through the anus. The worm is segmented, with each segment containing a "closed" area of organs, such as nephridia (for waste management), as well as several capillaries. The worm has five heart arches and a brain (but this brain is known as a "ganglion") on the very tip and inside of its head. Around the 13th or so segment is the clittellum, the reproductive organ of the worm (that's the part that looks like a bloated, pink ring). It's responsible for receiving and delivering sperm when two earthworms reproduce. Earthworms breathe through their skin.
The grasshopper is different. They belong to phylum arthropoda (which means "jointed foot"), class hexapoda, order insecta. Unlike the earthworm, grasshopper respiration (breathing) occurs through tiny tubes located at the base of its abdomen. The tubes lead to a tracchael system--a series of tubes. They have an opened circulatory system, which means that blood flows without the use of veins and arteries. They have similar digestive glances. They have six legs that are jointed at the "knees and elbows" of each appendage. Obviously, they have wings, which makes all insects one of the most impressive and successful animals on the face of the Earth. Unlike the worm, which has no skeletal system, the grasshopper has a touch exoskeleton and a soft "inside." When they become too large, this exoskeleton is shed and a new one is grown. The grasshopper also has a ganglion (not a brain), but the grasshopper reproduces sexually between sexes. Unlike the earthworm, which is entirely hermaphroditic (each earthworm is both male and female).
I had several biology courses, and the lab courses taught me a lot of this information. I felt it would be better to share this with you than just redirect you to a site. You can use a lot of this imformation to really impress the judges. Hopefully I helped you in some way.
If you have any questions, e-mail me or message me. I'd be glad to help in any way I could. I don't know very many sites, but I can help you understand the anatomical differences between the two if you need that.
2007-05-22 09:17:04
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answer #1
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answered by Mr. Jankovich 3
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GRASSHOPPER:
More complex: http://entomology.unl.edu/charts/refchrts.htm
Very simple: http://www.sparta.k12.il.us/SID/bugs/grasshopperanatomy.htm
EARTHWORM:
http://sciencefun4all.net/Life_Sci/05BodyStructure/homework/EarthwormPictures.html
2007-05-22 09:08:14
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answer #3
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answered by Yahzmin ♥♥ 4ever 7
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Maybe I should sign up for a class in Anatomy and Physiology...# C is definitely a turn on
2016-03-12 21:04:08
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answer #4
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answered by Anonymous
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It takes 11 seconds for yahoo answers page to open for me to be able to click on [add your answer] button. thus, is my laptop slow?
2016-08-24 03:16:40
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answer #5
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answered by Anonymous
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