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Name Class Date Section 284 Echinoderms (pages 734738) Key Concepts What are the distinguishing features of echinoderms? What functions are carried out by the water vascular system of echinoderms?.

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  3. Proceed to the introduction section. Answer questions regarding the internal skeleton and the environment inhabited by echinoderms by filling in the blanks provided.
  4. Move to the 'What Is an Echinoderm?' section. Respond to the true/false statements and list the five features that characterize echinoderms as instructed.
  5. In the 'Form and Function in Echinoderms' section, describe the functions of the water vascular system, tube feet, and the nervous system based on your understanding from the text.
  6. Complete the table about groups of echinoderms, filling in the descriptions of feeding and body for each specified group.
  7. Conclude with the Ecology of Echinoderms section. Answer the questions related to the effects of changes in echinoderm populations and identify true statements about their ecology.
  8. Once all sections are completed, ensure to review your answers. After confirming accuracy, save your changes, download the completed form, print it out if necessary, or share it as required.

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All echinoderms have an internal support system called an endoskeleton and a large body cavity containing a set of canals called a water vascular system.

What happens if a sea star is pulled into pieces? Each piece will grow into a new animal, as long as it contains a central portion of the body.

Although echinoderms look like they have a hard exterior, they do not have an external skeleton. Instead, a thin outer skin covers an internal skeleton made of tiny plates and spines. This provides rigid support. Some groups of echinoderms, such as sea urchins (Figure below), have spines that protect the organism.

Unlike other animals, the coelom of echinoderms forms two cavities.

Echinoderms have a mesodermal skeleton in the dermis, composed of calcite-based plates known as ossicles.

Echinoderms (starfish, sea urchins and their allies) are an exception; all modern species exhibit pentaradial (five-fold) symmetry, but the phylum also possesses an extensive fossil record that includes bilateral, asymmetrical and radial forms [1,2].

Echinoderms have an internal skeleton made of bony plates (ossicles) of calcium carbonate. They deposit this material after extracting dissolved calcium and carbonate (bicarbonate) ions from sea water. In some species, such as the sea urchin, plates of the skeleton are locked together to form a rigid structure.

The bodies of echinoderms are made of hard calcium-based plates that are often spiny and always covered by a thin skin. The echinoderm skeleton is thus on the inside—called an endoskeleton.

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Fill Section 28 4 Echinoderms

The bodies of most echinoderms are twosided a. What are 5 features that characterizes echinoderms? What are the five features that characterize echinoderms? Spiny skin internal skeleton a water vascular system suctional cup-like structures called tube feet Here are the Section Review Here are the Study Guide and Skill Activity Video segments. Sea-urchin. 28-4 Echinoderms (Part 2). Echinoderms are coelomate, and deuterostomes. Echinoderms include sea stars (starfishes), sea urchins, sand dollars, sea cucumbers, and sea lilies. We provide an update, based on literature records, on biodiversity and distribution of echinoderms along the state of Santa Catarina, Brazil. Section Assessment 28-4.

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© Copyright 1997-2025
airSlate Legal Forms, Inc.
3720 Flowood Dr, Flowood, Mississippi 39232
Form Packages
Adoption
Bankruptcy
Contractors
Divorce
Home Sales
Employment
Identity Theft
Incorporation
Landlord Tenant
Living Trust
Name Change
Personal Planning
Small Business
Wills & Estates
Packages A-Z
Form Categories
Affidavits
Bankruptcy
Bill of Sale
Corporate - LLC
Divorce
Employment
Identity Theft
Internet Technology
Landlord Tenant
Living Wills
Name Change
Power of Attorney
Real Estate
Small Estates
Wills
All Forms
Forms A-Z
Form Library
Customer Service
Terms of Service
Privacy Notice
Legal Hub
Content Takedown Policy
Bug Bounty Program
About Us
Blog
Affiliates
Contact Us
Delete My Account
Site Map
Industries
Forms in Spanish
Localized Forms
State-specific Forms
Forms Kit
Legal Guides
Real Estate Handbook
All Guides
Prepared for You
Notarize
Incorporation services
Our Customers
For Consumers
For Small Business
For Attorneys
Our Sites
US Legal Forms
USLegal
FormsPass
pdfFiller
signNow
airSlate WorkFlow
DocHub
Instapage
Social Media
Call us now toll free:
+1 833 426 79 33
As seen in:
  • USA Today logo picture
  • CBC News logo picture
  • LA Times logo picture
  • The Washington Post logo picture
  • AP logo picture
  • Forbes logo picture
© Copyright 1997-2025
airSlate Legal Forms, Inc.
3720 Flowood Dr, Flowood, Mississippi 39232