You are investigating a new kind of flatworm and give it food attached to charcoal pieces so that the digestive system can be seen under a microscope. When you look, you can see what you think is a mouth but cannot see an anus. What kind of digestive system would this worm have? -a hematocoel system -a closed digestive system -none of these choices are correct -an incomplete digestive system -radially symmetrical
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- Unlike the turbellarians earthworms have a complete digestive system. This means that; The earthworms do not have a typical stomach like other animals do The earthworms have a digestive system with only one opening The earthworms feed similar to fungi; by absorbing materials across the body wall The earthworm digestive system has both a mouth and an anusAlthough nematode worms and arthropods do not appear related, they, in fact, are. One similarity between these two groups of organisms is/are; They both have a hydrostatic skeleton They both molt They both have a segmented body plan They both have a ventral nerve cord and nerve gangliaWhat type of symmetry is seen in the roundworm? Does it exhibit cephalization? Ascaris is a parasite that swims constantly in human intestines. What structure protects the nematode from being digested? View the Trichinella slide. Trichinella is also a parasite. It can infect humans as well as other mammals like pigs, bears, and rodents. If untreated, it can lead to death.What mammal tissue does this roundworm infect?Draw a picture below of the Trichinella as viewed under the microscope. Although not mentioned on the website, if available view the live vinegar eel specimens. If there are no live specimens available, check out this you tube video instead: https://www.youtube.com/watch?v=UnjwvtFvyeQDescribe the movement of the vinegar eels.Do they have a complete or incomplete digestive system?
- 11) Turbellarians are free-living worms in Phylum Platyhelminthes. They have a thin, very flat body form. Their body has to be flat because Group of answer choices they need to be able to expand their body when they breathe they need space for their notochord they rely on diffusion across their body wall for gas exchange they do not exhibit any cephalization so this makes them more efficient they have an exoskeleton and they would be too heavy to move if they weren't flatFlatworms show bilateral symmetry and some cephalization. True False Some parasitic platyhelminths lost their digestive tract. True False Platyhelminths can remove excess water out of the body. True FalseParasitic flatworms have very different bodies than free living flatworms. Which of the following are differences that you would expect to see between these two kinds of worms? (choose all that apply)**Note that all correct answers are required for credit. Parasitic flatworms will likely lack a digestive system Parasitic flatworms will lack sensory structures Parasitic flatworms will produce more eggs Parasitic flatworms will have well developed eyes
- Label the following as Porifera, Cnidaria or Both: -Composed of radial symmetry. -Composed of asymmetrical assemblage. -Do not have true tissue present. -True tissue present. -Possess flagellated cells called choanocytes. -Name of gelatinous matrix is mesoglea. -Name of gelatinous matrix is mesenchyme. -They use both intra and extra cellular digestion. -They use intracellular digestion. -Under stress they release aggregates of amoebocytes for reproduction. -Their asexual reproduction is through budding. -Their body wall possess two cellular layers.Figure 28.45 Which of the following statements about insects is false? Insects have both dorsal and ventral blood vessels. Insects have spiracles, openings that allow air to enter. The trachea is part of the digestive system. Insects have a developed digestive system with a mouth, crop, and intestine.Figure 28.21 Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.
- Although they are related, the digestive system of an earthworm and Ascaris are very different. Why do you think this is?Please match the term with the description. the anterior end of a tapeworm that attaches to the inside lining of its host's digestive tract [ Choose ] [Choose] medusa describes the number of tissue layers in polyp coelom Cnidarians cnidocytes monoecious the cells that move water through a sponge gastrovascular cavity acoelom pharynx the cells that produce nematocysts scolex gonozooid osculum pseudocoelom triploblastic choanocytes diploblastic spongocoel water leaves a sponge through this opening proglottid spicule ventral sucker an incomplete digestive tract a planarian uses this to suck up food particles [ Choose ] a fluke uses this to hang onto its host's [ Choose ] tissues > > >The defining feature of the cnidarians is that they all have nematocytes (cnidocytes). These cells; Are nerve cells that allow the cnidarians to sense the environment Are cells lining the gastrovascular cavity Are filter feeding cells on the tentacles Are stinging cells on the tentacles