Starfish Dissection

Moon Jellyfish are in the “Animalia Kingdom, Phylum Cnidarian, Class Scyphozoan, Order Semaeostomeae, Family Ulmaridae, and Genus Aurelia” ( Myers, 2016 ; Espinosa, ; 2016 ; Parr, 2016 ; Jones, 2026 ; Hammond, 2016 ; Dewey, 2016). The morphological description of Cnidarians are corals, sea anemones, jellyfish and hydroids. These cnidarians form a diverse phylum that contains ~9000 species, which live in aquatic (predominantly marine) environments. The phylum-defining trait of Cnidaria is the stinging cell, the nematocyte an extrusive organelle used for predation, adhesion and defense (Holstein, 1981; Lengfeld et al., 2009; Tardent and Holstein, 1982) (Steele and Technau; 2011). Also, this phylum, Cnidarians, are divided into two groups, “Anthozoa (sea anemones, corals and sea pens), which live as

Secondly, the human body, crayfish, earthworm, and frog also have many similarities and differenced of how their respiratory system works. The crayfish respiratory system is the least complex. Crayfish have gills, which are used to release carbon dioxide and to pick up oxygen, by having a constant flow of blood. Frogs consist of nostrils and larynx, which opens up two lungs. The walls of the lungs are filled with capillaries. Capillaries are

Anatomical features are greatly responsible for the popularity of Daphnia. The most prominent anatomical feature of Daphnia is transparency; many organs, including the heart’s beating, are visible with the human eye. Additionally, the head of Daphnia have a compound eye and antennae, both used to improve swimming performance (Chin, 2011; Corotto, 2010). Another notable feature of Daphnia is the overall body shape that resembles a human kidney (Chin,

When society thinks about crayfish and earthworms they become extremely curious about how their bodies operate because of how they are made up. I will give a brief synopsis of both animals before going into major detail about them. According to the online website named dictionary.com, it says that an earthworm is a burrowing annelid worm that lives in the soil. Earthworms play an important role in aerating and draining the soil and in burying organic matter (Dictionary). Crayfish are nocturnal freshwater crustacean that resembles a small lobster and inhabits in streams and rivers (Dictionary). Crayfish and earthworms are some very interesting animals that possess some exclusive qualities both similar and different.

Crayfish (Procambarus clarkii) are crustaceans that are similarly related to crabs, lobsters and shrimps. They live in partly salty water (brackish water), rivers, ponds and are considered omnivores because they feed on small fishes, plants, detritus, mollusk, and other small invertebrates. Crayfish have a hard-calcified exoskeleton which is typically made of structural polysaccharide called chitin. This calcified exoskeleton must shed for the crayfish to grow (Fitzgerald, 2006).

In this experiment, our objectives were to observe and analyze the metabolic rate of Orconectes rusticus crayfish by measuring the rate at which dissolved oxygen in the water was consumed. Furthermore, we looked to explore the relationship that body size had on the metabolic rate of the organism. We hypothesized that the metabolism of the crayfish would increase as the body length of the organism increased.

My critter is fish. The name of the fish is called the Goldfish Saurus meaning it is half dinosaur and half guppy. This type of fish is a hunting fish, it mainly eats and kills tiny animals. It lives in the deep seas of the Pacific Oceans. The Goldfish Saurus hibernate for half a year, it likes to sleep in little burrows of seaweed. The Goldfish Saurus eats small fish and baby octopi and squids that is smaller than itself. It kills its prey by using the scaly fins on top of his back to directly jab its opponent. For self defence the Goldfish Saurus The tail of the Goldfish Saurus is very strong and its function is to move forward in upward swimming strokes. This kind of fish moves pretty quickly and catches its prey instantly. The Goldfish

The postlarval stage is the stage where the crayfish develops its bones and outer shell. The last stage of the crawfish life cycle concludes in the adult

--Today, while dissecting a dogfish shark, I was bombarded by memories of the dissections I performed during my junior year of high school. Mrs. Strieby’s Zoology classroom had been filled with the same cold, metal dissection pans and the same repulsive stench of formaldehyde-soaked fish. Because I had forgotten how the interior of the organism looked, I was filled with the same excitement and fascination when I saw its unusual internal organs. Various points throughout my life have a certain vibrancy in memory. I have noticed that these special periods coincide with learning new, captivating material; participating in events that disrupt my normal routine, or when I progress in my relationship with Jesus Christ. Second semester of junior year

1)Every animal has unique differences from each other to make them and their species special. For example, Jesus Christ Lizard has a very unique structural adaptation. If this Lizard feels a threat, it can run on top of the water very fast. Another example is, stag beetle. Male stag beetle has a very big jowl and this is important for them because with a bigger jowl they can fight easily with the other stag beetles and reach out the female beetle.

The researchers focused their study on determining whether cuttlefish adjust their body pattern intensity with reference to artificial and natural substrate intensity under different light conditions of bright light, moderate light, low light, and extremely low light. For each set of experiments, 10 adult Sepia officinalis were confined with an artificial or natural substrate placed the floor and walls of a seawater-filled tank and was left to get accustomed to low light for 20 minutes. After those 20 minutes, a photo was taken using a flash, digital camera. The cuttlefish is then left to adapt in a set light condition with the same substrate for another 20 minutes. Following the 20 minutes, the light is turned off and a flash photo was

The following section was entitled “What Does Developement Tell Us,” and in it, Jeffery described the developmental phases of Astyanax because “evolutionary changes proceed through alterations in development.” By describing the different phases, Jeffery was able to point out the places where the development of the eyes in cavefish morphologies is different from the surface-dwelling fish. The first phase of eye development in both forms of the Astyanax is the appearance of optic vesicles, and with this appearance and other simultaneous mechanisms, the eye primordia, consisting of the lens vesicle, an optic cup with an inner retinal layer and an outer retinal pigment epithelium layer, and optic stalk, forms. I found it extremely important

Stomphia is seen to detach itself from a rock when a starfish stimulates it, causing the anemone to swim away in a wave-like motion. The author conducted various experiments to see what muscles contracted and relaxed during the swimming response, as well as whether or not chemical substances given off by the starfishes is what elicits the anemone’s response when it comes into contact with them. Both T. A. Stephenson noted this activity of the anemone in 1935 and Yentsch and Pierce then observed it again in 1955. No solid conclusions had come about to fully explain the reasoning for this interaction between the starfish and Stomphia. Specimens were collected in the summer and fall of 1955 from the San Juan Archipelago and the Puget Sound through

Although there are many fascinating animals that can call the Intertidal Zone home, the starfish, or sea star, is one that really stands out. To begin, National Geographic reports, “most sea stars also have the remarkable ability to consume prey outside their bodies. Using tiny, suction-cupped tube feet, they pry open clams or oysters, and their sack-like cardiac stomach emerges from their mouth and oozes inside the shell. Swimming in the ocean, the stomach then envelops the prey to digest it, and finally withdraws back into the body.” Because the starfish needs many ways to eat while in the Intertidal Zone, this is one example of a way that they can find food, because food is hard to find in the

Cnidarians (or coelenterates), including sea anemones, jellyfish, and corals, are built mostly of sheets of cells, and they exploit the large surface area of the