This week in science #9

     This week in science I did alot of dissecting. I disected a skate , and a perch. The insides of the animals were very interesting. The perch had a yellowish liver that was easily removed . I also had to help my friend cut their skate's stomach. I liked the skate alot because it was huge !

     This week in science I learned how to dissect. It was petty easy , just use the scalp to cut a small incision then use the scissors to cut the skin easily . I learned that the liver of a perch is yellowish . I also learned how to distinguish a male and female perch. I know how to distinguish a male and female skate too. One more key componet i learned was how to work well with my partners. I learned how to be organized and work together so everything goes smoothly.

   

  Both the perch and skate , had livers . They looked similar but not exactly the same. The liver works the same , to clean out liquids. They both had gills too , but the perchs gills were slight smaller. They use these gills to breathe underwater. They both had brains too. The brain on the perch was very weird because it did not look like I expected it to look. I found this very cool.

This week In Science #8

     This week in science I dissected a Crawfish. These two pictures above show a Crawfish. The first picture shows the head view of the Crawfish. They use their antenna as their second eyes. This feature helps them feel vibrations in their environment. The proximal of the antenna connects at the head. The Distal is the end of the antenna. This adaption allows them to get away from predators and help them survive . The dorsal view of the craw fish displays all the antennas and eyes. The ventral view displays the Crawfish's abdomen , where the body segments are.

     This week in science I learned a lot of interesting things. While dissecting , I learned that the liver of a Crawfish is yellow/orange color . One question that I have is,  how does a Craw fish find food if it doesn't have its antenna ? Also, do Crawfish have good eye sight ? I can also make a connection with my animal , because earlier on the year we did a project where our animals had to adapt to an environment . This is similar because i learned that a Craw fish uses its antenna to feel around it environment , and this is a perfect example of animals adapting to their environment.