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Transcript of Isabelle's Prezi
By: Isabelle, Hadlee, Aiden and Rose
do not have any distinct tissues or organs and no germ layers. They don't have a gut, any body cavity, segmentation, circulatory system, nervous system, or or way of excretion. Many invertabrates are classified by their specialized tissue, but porifera need to be classified by something else because they have no specialized tissue.
Annelida have three basic tissue layers. They have a nervous system, a complete digestive system, and vessels within a circulatory system. Also, some Annelida have gills for respiration.
Nick, and Zach. "Annelida." mbbiology. np, nd. Web. 29 Apr. 2014. <http://mbbiology.wikispaces.com/Annelida>.
Walhert, John H., and Mary J. Holland. "Phylum Annelida." Laboratory Notes for BIO 1003. np, 30 Aug. 1999. Web. 1 Jan. <http://faculty.baruch.cuny.edu/jwahlert/bio1003/annelida.html>.
Jackson, Neil C. "Unique Features to Nematoda." The Roundworms (Phylum Nematoda). N.p., Fall 2004. Web. 29 Apr. 2014. <http://www.personal.psu.edu/users/n/c/ncj111/>.
Thick cuticle covering body with muscles below it, between the cuticle and pseudocoel. The Nematode pushes on the cutical and pseudocoel to form a hydrostatic skeleton, the most widely used system for allowing animals to move. Most animals have nerves branching out towards muscles but Nematodes' muscles are the ones that branch out to the nerves. Nematodes do not have a circulatory system because their pseudocoel does that for them.
Cnidarians have two tissue layers. The outer layer is the protective epidermis. The inner layer is the gastrodermis, which helps line the gastrovascular cavity. They have nerve cells of simple protoneurons formed for the purpose of a nerve net with no central nervous system. Posses stinging cells/organelles.
Platyhelminthes have different tissues that work together in any function they face. There is a level of organization as the result. There are three main germ layers- ectoderm, endoderm, and mesoderm. The ectoderm helps raise the epithelium. The endoderm helps raise the lining of the gut. The mesoderm helps raise the lining between both the endoderm and the ectoderm.
"Kingdom Anamalia." PHYLUM PLATYHELMINTHES - triploblastic acoelomates. N.p., n.d. Web. 25 Apr. 2014. <http://www.esu.edu/~milewski/intro_biol_two/ lab__10_platy_nemat/Platyhelminthes.html>.
TheFreeictionary.com D.M. Fedotov, n.d. Web. 28 Apr.2014 <http://encyclopedia2.thefreedictionary.com/Echinodermata>.
Wray A., Gregory. "Echinodermata." Echinodermata. Gregory A. Wray. 14 Dec.1999. Web 28 Apr.2014.
classified by its specialized tissues?
2) How many tissue layers does
3) What is one of
Farabee, M.J. MUSCULAR AND SKELETAL SYSTEMS. M.J. Farabee, Tuesday May 2010. Web. 30 Apr. 2014. <http://www2.estrellamountain.edu/faculty/farabee/biobk/biobookmusskel.html>.
4) What is a system that N
5) Why do some
6) How many main germ layers do
The water vascular system is what helps Echinoderms eat, breath, move and sense their surroundings. The water vascular system is filled with cannals and pumps that contract and relax the Echinoderm can then extend or retract its leg. The nerve ring is a circles of fiber in Echinoderms. Sensitive cells cover the body and sense touch and chemical signals in the water. A simple eye resides on the end of each arm it senses light. A radial nerve stretches from the nerve ring to the arm, this controls the movement of the arms.
1. Porifera have no gut while cnidarians and platyhelminthes do.
2. Echinodermata has sensitive cells
3. Nematoda has no circulatory system unlike annelida.
4. Porifera have no distinct tissue or organs.
5. Porifera has no germ layers or specialized tissue.
2. Platyhelminthes and annelida both have a nervous system
3. Porifera and annelida both have a circulatory system.
1. Platyhelmentheses, Nematoda,Annelida, Arthropada, and Echinodermata all have three germ layers.
Speialized Tissue Compare and Contrast
7) Where are
8) What is weird about the way
muscels branch out?
Some of these invertabrates are more advanced like the echinodermata, nematoda and the annelida. These are very advance because they all have digestive systems, however; the echinodermata doesn't have a specific digestive system because the water vascular system does that for them. Then there are platyhelminthese and cnidaria that are the next advanced. They have specialized tissues but the cnidaria doesn't have a resperitory system and the platyhelmenthese have no circulatory system. Finally there is the porifera the least advanced phyla. Porifera has no specialized tissues at all.