Phylum nematode Characteristics of Nematoda:- 1)Bilaterally symmetrical‚ and vermiform. 2) Body has more than two cell layers‚ tissues and organs. 3) Body cavity is a pseudocoel‚ body fluid under high pressure. 4) Body possesses a through gut with a subterminal anus. 5) Body covered in a complex cuticle. 6) Has a nervous system with pharyngeal nerve ring. 7) Has no circulatory system (no blood system) 8) Reproduction normally sexual and gonochoristic. 9) feed on just about everything
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in general are divided into Vertebrates and Invertebrates. Vertebrates are animals with a vertebral column or backbone and Invertebrates are animals without a backbone. Invertebrates include organisms from the following phyla: Porifera‚ Cnidaria‚ Nematoda‚ Mollusca‚ Annelida‚ Arthropoda‚ Echinodermata‚ etc. Invertebrates can be further divided into two groups according to their level of complexity and specialization. These are: 1. Lower Invertebrates: This comprises of the phyla Protozoa‚ Porifera
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of their similar body plan and segmentation. The other hypothesis is that arthropods evolved more recently from a nematode ancestor than an annelid like ancestor because of their shared ecdysis trait. Hypothesis 1 Nematoda Annalida Arthropoda Hypothesis 2 Annalida Nematoda Arthropoda Reasoning: The morphological data that supports hypothesis one is that annelids and arthropods both have segmented bodies‚ dorsal circulatory systems‚ ventral nervous systems‚ and appendages. The morphological
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- In Pennsylvania the reservoir of Parelaphostrongylus tenuis is the White-tailed Deer. - A reservoir host is the host of an infection in which the infectious agent multiplies and/or develops‚ and on which the agent depends for survival in nature; the host essential for the maintenance of the infection during times when active transmission is not occurring. Life cycle of Parelaphostrongylus tenuis (A)Adult worms in meninges lay eggs (B) eggs go into circulation‚ reaches the lungs (C) hatches into
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01/28 Domain: Eukarya “Eu karyotic Protist Supergroups” 1. Supergroup Excavata Genus – Euglena Tryponsoma 2. Super group Chromolaveolata a. Ceratium b. Plasmodium c. Paramecium d. Laminaraia 3. Super group Archaeplastida a. Red Algae “ Polysiphonia” b. Green Algae “Chlamydomadas‚ Hydrodictyon‚ Spirogyra‚ Volvox” 4. Unikonta a. Amoeba b. Some other small creatures that have flagella Pro – No membrane‚ No Histone‚ They have a cell wall‚ unicellular Super groups in Eukarya domain:
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Wanted PHYLUM NEMATODA ;COMMON NAME: ROUNDWORM What causes this disease: contaminated soil‚ contaminated food and water‚ and insects. Genus: Toxocara Species: Toxocara canis How they’re spread: Roundworms are quite common in animals‚ who easily spread the infection when the worm eggs develop into larvae and are in the animals feces. Pets get the infection by eating infected soil‚ licking contaminated fur or paws‚ or drinking contaminated water. If the pet is a female and had babies‚ the babies
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Lab Summary Diversity One Diversity Two Diversity Three Dylan Palacio Bio 102 Introduction- Throughout the history of man kind one question has been constantly ASKED and never seems to get a definite answer. The question is who are we? And where do we come from? Rather then spark a religious verse science debate and draw a very emotional line in society we let everyone believe what they want to believe. However regardless of what you want to believe facts are facts and science is science. After
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Cestoda is the name given to a class of parasitic flatworms‚ of the phylum Platyhelminthes. Informally biologists refer to them as Cestodes. The most notorious species commonly are called tapeworms‚ for example Taenia solium‚ the "pork tapeworm". Cestodes are all parasitic and their life histories vary‚ but typically they live in the digestive tracts of vertebrates as adults‚ and often in the bodies of other species of animals as juveniles. Over a thousand species have been described‚ and all vertebrate
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Animal Phyla Lab Adapted from “Phylum Lab” produced by the National Aquarium in Baltimore The diversity of animal life on Earth is astounding. Each animal has a unique body plan which allows it to survive and adapt to its given surroundings. With such an abundance of species‚ classifying animals into different categories is necessary. At first the diversity of animals can be overwhelming‚ but after further research and observation‚ many likenesses appear. These similarities become the basis for
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are using this week‚ is a planarian. Planarians are in the phylum Platyhelminthes (which means “flat worm”)‚ which contains about 25‚000 species‚ most of which are in the tapeworm and fluke groups. These are parasitic‚ living in other organisms where they can cause serious disease such as schistosomiasis (See Sadava‚ Fig. 31.15‚ and pp 695-696). Other flat worms are native to salt water‚ fresh water‚ or moist soil. Platyhelminthes are the simplest bilaterally symmetric and triploblastic animals (meaning
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