Acoelomates in Platyhelminthes
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Questions and Answers

What is the characteristic of the body cavity in phylum Platyhelminthes?

  • It has a fluid-filled body cavity
  • It has a well-defined coelom
  • It has no body cavity or coelom (correct)
  • It has a segmented body cavity

    • What fills the space between the ectoderm and endoderm in phylum Platyhelminthes?

  • Fluid-filled cavity
  • Mesenchyma or parenchyma (correct)
  • Well-defined coelom
  • Segmented tissue

    • What is the cellular tissue that fills the space in Acoelomates of phylum Platyhelminthes?

  • Well-defined coelom
  • Fluid-filled cavity
  • Mesenchyma or parenchyma (correct)
  • Segmented tissue

    • Match the following terms with their descriptions in phylum Platyhelminthes:

    <p>Acoelomates = No body cavity or coelom Mesenchyma or parenchyma = Cellular tissue filling the space between ectoderm and endoderm Platyhelminthes = Phylum with no body cavity or coelom Mesoderm = Forms the loose, cellular tissue in Acoelomates of phylum Platyhelminthes</p> Signup and view all the answers

    Platyhelminthes there is no body cavity or coelom, and the mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma which ______ the space between the ectoderm and endoderm.

    <p>fills</p> Signup and view all the answers

    What is the body cavity characteristic of phylum Platyhelminthes: acoelomates, pseudocoelomates, or coelomates?

    <p>False</p> Signup and view all the answers

    True or false: In phylum Platyhelminthes, the mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma that fills the space between the ectoderm and endoderm?

    <p>True</p> Signup and view all the answers

    True or false: Phylum Platyhelminthes has a well-defined coelom?

    <p>False</p> Signup and view all the answers

    Phylum Platyhelminthes has a body cavity called coelom.

    <p>False</p> Signup and view all the answers

    The mesoderm in Phylum Platyhelminthes forms a loose, cellular tissue called mesenchyma or parenchyma.

    <p>True</p> Signup and view all the answers

    The mesenchyma or parenchyma fills the space between the ectoderm and endoderm in Acoelomates of Phylum Platyhelminthes.

    <p>True</p> Signup and view all the answers

    What is the characteristic of the body cavity in phylum Platyhelminthes?

    <p>There is no body cavity or coelom in phylum Platyhelminthes.</p> Signup and view all the answers

    What is the cellular tissue that fills the space in Acoelomates of phylum Platyhelminthes?

    <p>Mesenchyma or parenchyma is the cellular tissue that fills the space in Acoelomates of phylum Platyhelminthes.</p> Signup and view all the answers

    What is the mesoderm in phylum Platyhelminthes called and what does it do?

    <p>The mesoderm in phylum Platyhelminthes forms a loose, cellular tissue called mesenchyma or parenchyma, which fills the space between the ectoderm and endoderm.</p> Signup and view all the answers

    What is the characteristic of the body cavity in phylum Platyhelminthes?

    <p>There is no body cavity or coelom in phylum Platyhelminthes, and the mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma which fills the space between the ectoderm and endoderm.</p> Signup and view all the answers

    What is the name of the loose, cellular tissue that fills the space between the ectoderm and endoderm in Acoelomates of phylum Platyhelminthes?

    <p>The loose, cellular tissue is called mesenchyma or parenchyma.</p> Signup and view all the answers

    True or false: In phylum Platyhelminthes, the mesoderm forms a well-defined coelom?

    <p>False. In phylum Platyhelminthes, there is no well-defined coelom; instead, the mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma which fills the space between the ectoderm and endoderm.</p> Signup and view all the answers

    What is the name of the loose, cellular tissue that fills the space between the ectoderm and endoderm in Acoelomates of phylum Platyhelminthes?

    <p>Mesenchyma or parenchyma</p> Signup and view all the answers

    What does the mesoderm in phylum Platyhelminthes form, and what is its function?

    <p>It forms a loose, cellular tissue called mesenchyma or parenchyma, which fills the space between the ectoderm and endoderm to support and protect the internal organs.</p> Signup and view all the answers

    What are animals without a body cavity called, and how are they characterized in phylum Platyhelminthes?

    <p>Animals without a body cavity are called acoelomates, and in phylum Platyhelminthes, they are characterized by the absence of a coelom and the presence of mesenchyma or parenchyma as a packing around the internal organs.</p> Signup and view all the answers

    What is the term for animals in phylum Platyhelminthes that lack a body cavity, and what is the name of the loose, cellular tissue that fills the space between the ectoderm and endoderm to support and protect internal organs?

    <p>Acoelomates; mesenchyma or parenchyma</p> Signup and view all the answers

    Describe the characteristics of the body cavity in phylum Platyhelminthes, and explain the function of the loose, cellular tissue formed by the mesoderm.

    <p>Phylum Platyhelminthes lack a body cavity or coelom. The mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma, which fills the space between the ectoderm and endoderm to support and protect internal organs.</p> Signup and view all the answers

    Explain the role of the mesenchyma or parenchyma in acoelomates of phylum Platyhelminthes, and discuss how it differs from the body cavities in other animal groups.

    <p>The mesenchyma or parenchyma, formed by the mesoderm, fills the space between the ectoderm and endoderm in acoelomates of phylum Platyhelminthes to support and protect internal organs. This differs from other animal groups that have well-defined body cavities or coeloms.</p> Signup and view all the answers

    Study Notes

    Characteristics of Acoelomates

    • Phylum Platyhelminthes lacks a body cavity or coelom.
    • Mesoderm forms a loose, cellular tissue called mesenchyma or parenchyma.
    • Mesenchyma or parenchyma fills the space between the ectoderm and endoderm.
    • This tissue forms a packing around the internal organs to support and protect them.
    • Animals with this characteristic are called acoelomates.

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    Description

    Test your knowledge of acoelomates in the phylum Platyhelminthes with this quiz. Explore the absence of a body cavity or coelom, and the formation of mesoderm, mesenchyma, and parenchyma in these organisms.

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