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Question
Through which hole the animals in this phylum take water in their body?
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Solution
Ostia
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Answer the question by choosing correct option.
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| Column I | Column II |
| A. Porifera | i. Canal system |
| B. Aschelminthes | ii. Water-vascular system |
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| Phylum/Class | Excretory Organ | Circulatory Organ | Respiratory Organ |
| Arthropoda | Lungs/Gills/ Tracheal System | ||
| Nephridia | Closed | Skin/parapodia | |
| Metanephridia | Open | ||
| Amphibia | Closed | Lung |
Name
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Name the asexual reproductive structures of Sponges.
