Podcast
Questions and Answers
Sponges are motile organisms.
Sponges are motile organisms.
False (B)
The central cavity of a sponge is called the ______.
The central cavity of a sponge is called the ______.
spongocoel
Which of these cell types is responsible for water flow in sponges?
Which of these cell types is responsible for water flow in sponges?
Explain how water movement is facilitated in sponges.
Explain how water movement is facilitated in sponges.
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Match the following sponge structures with their functions:
Match the following sponge structures with their functions:
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Flashcards
Phylum Porifera
Phylum Porifera
The taxonomic group that includes sponges, simple multicellular animals.
Spongocoel
Spongocoel
The large central cavity within a sponge where water circulates.
Osculum
Osculum
The large opening in a sponge through which water exits.
Ostia
Ostia
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Choanocytes
Choanocytes
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Study Notes
Phylum Porifera
- Animals in the subkingdom Parazoa are the simplest multicellular organisms, including sponges (Porifera)
- Most sponges are marine, but some live in fresh water
- Sponges lack true tissues or organs, but have specialized cells performing specific functions
- Sponge larvae can swim, but adults are immobile and attached to a substrate
- Water flow is crucial for excretion, feeding, and gas exchange, hence their complex structure facilitating water movement
- Structures like canals, chambers, and cavities enable water to reach nearly all cells
Sponge Body Structure
- Sponges have a basic cylindrical shape with a large central cavity, the spongocoel
- Water enters the spongocoel through pores (ostia)
- Water exits the spongocoel through a large opening called the osculum
- The mesohyl is a jelly-like substance between layers, containing specialized cells (amoebocytes, pinacocytes, choanocytes) involved in various functions
- Water flow is crucial, aiding in feeding, wastes removal and gas exchange
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Description
Explore the fascinating features of Phylum Porifera, commonly known as sponges. Learn about their unique body structure, specialized cells, and the importance of water flow for their survival. This quiz will help you understand the fundamental characteristics of these remarkable organisms.
