Question
Download Solution PDFWhich of the following cells line the spongocoels and canals in members of the phylum Porifera?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Collar cells.
Key Points
- The body of sponges (poriferans) has several minute pores called ostia through which the water enters into the central cavity, spongocoel.
- The flagellated cells called choanocytes (collar cells) line the spongocoel.
- These cells generate a flow of water and the water current helps in food gathering, respiratory exchange and removal of waste.
- The water finally goes out of the body through a large pore called osculum. (Plural: oscula).
- The body wall of the sponge is composed of two layers: outer pinacoderm and inner choanoderm. In between these two layers, mesenchyme is present with various mesenchymal cells.
Additional Information
- Somatic cells make up the connective tissue, skin, blood, bones and internal organs.
- White blood cells are made in the bone marrow. They are stored in your blood and lymph tissues.
- These sex cells are also called reproductive cells or gametes. Sperm cells are produced in men's testicles and egg cells are produced in women's ovaries
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