Podcast
Questions and Answers
Which of these animal groups lacks a true coelom?
Which of these animal groups lacks a true coelom?
The presence of a coelom allows organs to move freely within the body.
The presence of a coelom allows organs to move freely within the body.
True (A)
What is the primary difference between protostomes and deuterostomes?
What is the primary difference between protostomes and deuterostomes?
The difference lies in the order of development of the mouth and anus during embryonic development. Protostomes develop the mouth first, while deuterostomes develop the anus first.
A ______ is a body cavity entirely lined with mesoderm that separates the gut from the body wall.
A ______ is a body cavity entirely lined with mesoderm that separates the gut from the body wall.
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Match the following animal groups with their corresponding coelom type:
Match the following animal groups with their corresponding coelom type:
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Flashcards
Acoelomates
Acoelomates
Animals that lack a true coelom, with mesoderm filling the space between the body wall and digestive tract.
Coelomates
Coelomates
Animals with a true coelom, fully lined with mesoderm, allowing organ movement.
Pseudocoelomates
Pseudocoelomates
Animals with a body cavity that is partially lined with mesoderm and partially with endoderm.
Protostomes
Protostomes
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Deuterostomes
Deuterostomes
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Study Notes
Coelom Types
- Acoelomates: Triploblastic animals lacking a coelom; their mesoderm fills the space between the body wall and the gut.
- Coelomates: Triploblastic animals with a true coelom; the coelom is entirely within the mesoderm and lined with epithelium.
- Pseudocoelomates: Triploblastic animals with a body cavity formed from both endoderm and mesoderm. The body cavity is not fully lined with mesoderm, so it is considered a false coelom.
Digestive Cavities
- Protostomes: Animals in which the mouth develops before the anus.
- Deuterostomes: Animals in which the anus develops before the mouth.
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Description
This quiz explores the different types of coeloms and digestive cavities in animals. It covers the distinctions between acoelomates, coelomates, pseudocoelomates, protostomes, and deuterostomes. Test your understanding of these foundational concepts in animal biology.
