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In sponges, nutrition, respiration and excretion depends 
upon 
  • a)
    circulatory system
  • b)
    ambulacral system
  • c)
     haemocoelomic system
  • d)
    canal system
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In sponges, nutrition, respiration and excretion dependsupona)circulat...
Body of the sponges contains water canal system.. it helps in gethering food (nutrition), elimination of unwanted substance (excretion) ,exchange of gases (respiration)..water enters through the ostia, exit through the osculum.. the central body cavity is called spongicole or paragastric cavity...
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Community Answer
In sponges, nutrition, respiration and excretion dependsupona)circulat...
Canal system = the body of a sponge is organized in such a manner as to form a complex system of pores and canals.. This system is called canal system.. Food is gathered with the help of canal system and after entering the body, food is captured by the choanocytes for digestion... And there is no special respiratory structures in the sponges so the exchange of O2 and Co2 occurs through the water entering and going out with the help of canal system.... The undigested residue and the metabolic waste ; chiefly ammonia are eliminated out with the water through oscula and transfer of sperms is also occurs with the help of canal system... So in sponges nutrition, respiration and excretion depends upon canal system.. I hope that helps you to...
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In sponges, nutrition, respiration and excretion dependsupona)circulatory systemb)ambulacral systemc)haemocoelomic systemd)canal systemCorrect answer is option 'D'. Can you explain this answer?
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