What the Arthropoda?
Objective: compare two animals in the same phylum
By: Olivia Helm Guzman-4th
The Grasshopper Vs. The Crayfish
The Grasshopper
The common grasshopper can be found almost everywhere in the United States scattered all over. They are generally herbivorous feeding mostly on grass. They are preyed upon by birds, small rodents, mammals, other insects, and in some cases humans. Because they are so small and mostly defenseless, they have adaptations such as their super strong hind legs that help them to escape predators.
The Crayfish
Most crayfish are found in freshwater but some survive in salt water. They are mostly nocturnal and feed on snails, algae, worms, and tadpoles. These creatures are preyed upon by alligators, larger fish, the chicken turtle, otters, and various birds. It is also more likely to see a crayfish on the dinner table rather than a grasshopper in the United States, but not in all countries. To adapt to the murky waters that they live in, these animals have eyes on short stems that allow them to see in all directions.
The two have many traits in common due to the restated point that they're found in different phylums. For example they both have legs present. segmented abdomens, antennae present, and open circulatory systems. In this
But they're in the same phylum!
Arthropoda Cladogram
Exploring the Respiratory System
Even though these two systems of respiration are very different they serve the same function. Without this intake of oxygen the other systems cannot operate correctly and to put it simply without this system there would be no organism. They cannot live without oxygen making this a crucial system that if damaged could be deadly
Respiratory System of a Crayfish
Respiratory System of a Grasshopper
The Arthropoda Vs. The Chordata
Contestant 2: Olivia and her lab partner
Fun Facts!
Some grasshoppers can jump 200 times their length in just one jump.
The smallest grasshopper is about 1.25cm.
In Japan, grasshoppers are seen as a sign of good luck.
A grasshopper's eardrum is found in its abdomen so it's almost like they hear with their stomachs
Crayfish
There are 500 species of crayfish and 350 of them can be found in the U.S.A.
Crayfish can live up to two years in captivity but much longer in the wild.
When a female lays its eggs she keeps them on her swimmerets for a very long time and usually until they hatch.
External Structures of a Crayfish
External Structures of a Grasshopper
External Structures of Both Creatures
Sources Used..
http://jeanyanandcrystal.blogspot.com/2013/06/respiratory-system.html
http://wiki.hicksvilleschools.org/groups/hsbiology/wiki/9abf5/Respiratory_System.html
https://www.youtube.com/watch?v=rBml-wd3YCU
http://www.rsd.edu/schools/carmichael/masters/pdf/hwsystmswrky.pdf
http://www.express.co.uk/fun/top10facts/383268/Top-10-facts-about-grasshoppers
http://evolution.berkeley.edu/evolibrary/article/_0/constraint_15