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Which of the following is NOT one of the two tissue layers of a cnidarian? A. outer epidermis B. mesoderm that forms into all body systems C. inner layer lining the gastrovascular cavity

Which of the following is NOT one of the two tissue layers of a cnidarian? A. outer epidermis B. mesoderm that forms into all body systems C. inner layer lining the gastrovascular cavity

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Quiz Question: Tissue Layers in Cnidarians** **Question:** Which of the following is NOT one of the two tissue layers of a cnidarian? **Options:** A. Outer epidermis B. Mesoderm that forms into all body systems C. Inner layer lining the gastrovascular cavity --- **Educational Explanation:** Cnidarians are a group of aquatic invertebrates which include species such as jellyfish, corals, and sea anemones. They are diploblastic animals, meaning they develop from two primary germ layers: the ectoderm and the endoderm. 1. **Outer epidermis (ectoderm):** This is the outermost layer that covers the cnidarian's body. 2. **Inner layer lining the gastrovascular cavity (endoderm):** This is the inner layer that lines the digestive compartment of the cnidarian. **Correct Answer:** B. Mesoderm that forms into all body systems **Explanation:** Cnidarians do not have a mesoderm layer. The mesoderm is a third germ layer found in more complex organisms and it forms the muscles, bones, and circulatory system among other structures. Cnidarians, being diploblastic, only have the ectoderm (outer epidermis) and the endoderm (inner layer lining the gastrovascular cavity). **Further Learning:** For more detailed information on cnidarian anatomy and tissue layers, refer to the article "Understanding Diploblastic Organisms: A Focus on Cnidarians" in our Biology section.
Transcribed Image Text:**Quiz Question: Tissue Layers in Cnidarians** **Question:** Which of the following is NOT one of the two tissue layers of a cnidarian? **Options:** A. Outer epidermis B. Mesoderm that forms into all body systems C. Inner layer lining the gastrovascular cavity --- **Educational Explanation:** Cnidarians are a group of aquatic invertebrates which include species such as jellyfish, corals, and sea anemones. They are diploblastic animals, meaning they develop from two primary germ layers: the ectoderm and the endoderm. 1. **Outer epidermis (ectoderm):** This is the outermost layer that covers the cnidarian's body. 2. **Inner layer lining the gastrovascular cavity (endoderm):** This is the inner layer that lines the digestive compartment of the cnidarian. **Correct Answer:** B. Mesoderm that forms into all body systems **Explanation:** Cnidarians do not have a mesoderm layer. The mesoderm is a third germ layer found in more complex organisms and it forms the muscles, bones, and circulatory system among other structures. Cnidarians, being diploblastic, only have the ectoderm (outer epidermis) and the endoderm (inner layer lining the gastrovascular cavity). **Further Learning:** For more detailed information on cnidarian anatomy and tissue layers, refer to the article "Understanding Diploblastic Organisms: A Focus on Cnidarians" in our Biology section.
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