Invertebrates

Invertebrates ship of the line The Jellyfish argon truly a wonder of nature. They sire always been objects of deep observation and admiration. Not to signify the fact, that they are also considered in great awe, fear and even repulsion by some folks. The repulsion and fear befuddle originated from the fact that these creatures can be quite beautiful to behold, but extremely painful when stung by them. These marine creatures are classified under the group of Cnidarians. They typically have a soft jelly like consistency to their body, prompting the people to call them as Jellyfish. There are numerous surprises in store, when we deal with Jellyfishes.The first and beginning(a) of the surprise is the vast reservoir of chemical factories, inside the tiny body. Though this creature does not have a vertebral column, a proper blood of body and head, and not even a brain, yet this Jellyfish is seen to possess numerous different chemicals, some of which are extremely toxic and poisonous t oo. neighboring in store for the observer or the scientist is the next surprise, which is the fluorescent quality of these creatures. The Jellyfish possess a chemical protein inside their body fluid, called as aequorin, which was derived from the species of Jellyfish called as Aequorea Victoria.The GFP or the green fluorescent protein was derived from this protein. Both these proteins have a quality of photo luminescence, which means lighting up in the dark, and also the property of fluorescence. Then there are the Neon Jellyfish which are also called as rainbow Jellyfish. These do not produce any photo luminescent protein as such. yet yet they manage to shine or light up in the dark. They possess a hair like structure called cilia which help in their motility. The light which falls on these cilia is reflected back and this simple property of light reflection makes these rainbow Jellyfish fluorescent.Cycloporus Venetus (Blue Flatworm) FLATWORMS UMMM. THEYRE FLAT We have to run o ut of steam there. But thats the one obvious connection between all of the worms in this group. Sure we can tell you that there are over 20,000 known species. Most of the species are parasitic. They are super-primitive organisms that were the first to develop mesoderm. The big thing you should remember is that they are flat. There may be one more fact to remember. They are bring in every environment that has water. Many scientists believe there are hundreds of species we will still discover. BASIC TYPESYoull learn astir(predicate) a few continent examples of flatworms in your classes. Tapeworms are always a nasty example. They live in intestinal tracts of many species. Cats, dogs, and even you could wind up with tapeworms. Youll also hear about flukes. Its another parasitic species that has a close relationship with man and other mammals. They are suckers in the flatworm family. Planaria are harmless flatworms that are a great deal used in your biology labs. They are freshwater flatworms that have a head like an arrow. Theyre black with two white floater on their heads. Those spots are not eyes, but they do sense light.Flatworms have very simple nervous systems. WHERE WILL YOU FIND THEM? If you find water, theres a good opportunity flatworms will be around. Most are very small and not obvious immediately. Flatworms get most of their oxygen through diffusion. Since they have no narrow circulatory system, their flatness gives them a greater surface area to absorb more oxygen. There are species in many freshwater and saltwater environments as well as inside larger organisms. tour we made them seem easy to find, its sometimes very hard to track them down. Since many flatworms are parasites, they have lifecycles in different hosts.Eggs many be deposited in the feces of one species. Another organism might eat those eggs and development begins in the digestive system. The flatworm might then mature in the muscle tissue. Flatworms can get around. SOME STRUCTUR E STUFF Although really simple, flatworms have some go structures compared to some other animals. They were the first species to develop mesoderm. That mesoderm tissue develops into organs and muscles as the organism grows. They also have simple nervous systems and sensory organs. While they dont have a respiratory system or circulatory system to speak of, they do have a neat little digestive system.Most species of flatworms have no anus and a cavity with only one opening. While not all species do, many flatworm species use a mouth to eat. The only enigma with no anus is that the stuff you dont digest has to go out the mouth when youre done. Other materials that need to be removed from the system can be excreted through specialize cells called flame cells. Flame cells are the first appearance of excretory ducts in organisms. Flame cells have cilia that beat and filter out materials that the flatworm wants to get dislodge of.