CBSE Notes | Class 9th | Science| NCERT Based :Porifera
Submitted by admin on Fri, 12/02/2011 - 09:48
Porifera
The word Porifera means organisms with holes. These are non-matile animals attached to some solid support. There are holes or ‘pores’, all over the body. These lead to a canal system that helps in circulating’ water throughout the body to bring in food and oxygen. These animals are covered with a hard outside layer or skeleton. The body design involves very minimal differentiation and division into tissues. They are commonly called sponges, and are mainly found in marine habitats.
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