Dissections: This unit was about the external and internal systems of different organisms. One project that we did that well showed this was dissections.
My Dissection: Sting Ray( Myliobatoidei)
External Anatomy: The external layer of the Sting Ray was a hard exterior to make an incision into. The exterior seemed to consist of a hard cartilage and bone structure underneath the skin. The exterior consisted of the dorsal fins, mouth, nostrils, eyes, and two different gill slit locations. One on the bottom side and the other located directly behind the eye sockets of the sting ray.
Internal Anatomy: The first incision was made from the bottom of the Gill slits down to the genital/ dorsal fin location. Then side incisions where made to pin down the skin to the sides. There was a hard layer beneath the skin making it difficult to access the internal organs. The first organs revealed where the liver and kidneys located just above the dorsal fins. moving further up was the heart right above the liver. I removed the liver from the specimen, and reveled the intestines behind. Above the heart was the lungs and gills well attached to the cartilage layer of the skin. I removed the gills and lungs and saw the spine lined up on the back of the stingray.
Sting Ray Information: The Sting Ray lives in warm climate water and tends to stay in shallow areas where ever the ecosystem is. The food they tend to feed on is worms, mollusks, shrimp, and small fish. Sting Rays in the ocean use there fins to swipe away sand and look for food on the ocean floor. Sting Ray's are born into litters ranging from 5 to 10 in size. The mother when giving birth nourishes the babies in her body. This description describes mostly marine Sing Rays.