Annelid

During this lab observations of the external and internal structures of seastars were examined through dissection. Most notably, seastars are creatures that are deuterostomes. First of all, deuterostomes are organisms within Echinodermata and Chordate phylum that developed anus first. The egg for echinoderms have a little quantity of yolk that allows the egg to divide in its first and second cleavage stage into four equal blastomeres; this is also known as holoblastic cleavage. Although, if the…

development. This research, conducted by J.Rink, also mentions that the same stem cells found in planaria are also beginning to be found in organisms classified in Annelida, raising the question if this experiment could be conducted on annelids. Through evolution, Annelids now also have similar neoblasts (Rink 2012). Research also suggests that the evolution of sponges may take a part in this as well. From this it can be concluded that not only flatworms contain this gene but other organisms as…

A coelomate has a fluid filled body cavity, which is completely lined by the mesoderm. The organs of a coelomate are suspended within the fluid filled body cavity. This provides protection from any shock put on the organs. This fluid also provides shape to animals without a hard skeleton. Animals like Arthropoda and Echinodermata are examples of coelomates. Acoelomates lack internal cavities and fluid altogether. Their organs are located within the mesoderm which means less protected from shock…

Hypothesis: The diet that is best for earthworms is one made up of soil and grass, because earthworms are more likely to have grass in their environment outside the classroom. Introduction: Earthworms are defined dictionary.com is “any one of numerous annelid worms that burrow in soil and feed on soil nutrients and decaying organic matter.” However, what if the “soil nutrients” were changed into three different groups? After extensive research, I decided to test the effect of fruit peels, grass…

All animals belong to the supergroup Unikonta. Since these animals are found in almost every environment on earth, it has become possible to study their characteristics and construct evolutionary relationships, noting morphological and molecular similarities and differences. The relationships between the most primitive of animals were determined by the morphological traits of symmetry, tissues, body cavity, embryological development, and molecular evidence. [1] Symmetry and tissues are major…

Based on our findings, the NSAIDs aspirin and ibuprofen do have an impact on the heart rate of the Lumbriculus variegatus worms as evidenced by Figures 2 and 3 above. We observed that caffeine also had an impact on the heart rate of the worms. We can state that our hypothesis was correct when it came to the ibuprofen solutions because evidence supports the claim that the ibuprofen does increase the heart rate in Lumbriculus variegatus. Furthermore, as the concentration of ibuprofen increased,…

THE AMAZING CIRCULATORY SYSTEM The circulatory system preforms many different jobs. It carries oxygen to the cells of the body and it also caries nutrients throughout the body to make heat and energy. In addition to that, the vascular system delivers hormones to specific organs. Another thing the circulatory system does is collect metabolic waste and deliver it to the excretory glands. Lastly, the circulatory system works with the immune system to help fight infection and defend. The fact that…

Trenity Huff Mrs. Doerr E.L.A. 8th grade February 3, 2016 “Box Jellyfish” Box jellyfish are special in many different ways. They have unique talents and characteristics. Box jellyfish live in tropical waters. They also have very complex body systems. Box jellyfish are one of the few endangered species of jellyfish. Box jellyfish are rare and are very hard to see. Box jellyfish are really deadly to humans and animals. Box jellyfish have a lot of foods that they enjoy to eat. They barely have…

{{Info fauna |officialname = Eartheater Skall |nicknames = Settlement Mauler |classification = Annelid |habitat = Ellador |domesticated = No. |status = Rare. |}} A Dwarven settlement sprawling from mountain peak to horizon crumpling to debree, lay ruin by an Eartheater Skall who caverned chambers that inflicted a cave in. The Eartheater Skall is a critter native to Ellador, with white, matted fur and tissue dense enough to endure the ragged drag of the underearth it resides in. Found in…

Chapter 8: “The Elf-Child and the Minister” 1. After the governor challenges Hester’s fitness to raise Pearl, Hester makes an eloquent argument for why she is the perfect care-taker of Pearl, besides the most obvious fact that she is the child’s mother. She calls upon her inner strength and argues that the scarlet letter she must bore is a badge of shame but that, “this badge hath taught me,-it daily teaches me, - it is teaching me at this moment, - lessons whereof my child may be wiser and…