{"id":714,"date":"2018-01-18T19:57:24","date_gmt":"2018-01-18T19:57:24","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/wm-nmbiology2\/chapter\/introduction-to-phylum-porifera\/"},"modified":"2024-04-26T21:30:37","modified_gmt":"2024-04-26T21:30:37","slug":"introduction-to-phylum-porifera","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/wm-nmbiology2\/chapter\/introduction-to-phylum-porifera\/","title":{"raw":"Introduction to Phylum Porifera","rendered":"Introduction to Phylum Porifera"},"content":{"raw":"

What you'll learn to do: Identify the common characteristics of phylum Porifera<\/h2>\r\n[caption id=\"attachment_2372\" align=\"alignright\" width=\"349\"]\"The Figure 1. Sponges are members of the Phylum Porifera, which contains the simplest invertebrates. (credit: Andrew Turner)[\/caption]\r\n\r\nThe invertebrates, or\u00a0invertebrata<\/span><\/strong>, are animals that do not contain bony structures, such as the cranium and vertebrae. The simplest of all the invertebrates are the Parazoans, which include only the phylum\u00a0Porifera<\/span><\/strong>: the sponges (Figure 1).\r\n\r\nParazoans (\u201cbeside animals\u201d) do not display tissue-level organization, although they do have specialized cells that perform specific functions. Sponge larvae are able to swim; however, adults are non-motile and spend their life attached to a substratum. Since water is vital to sponges for excretion, feeding, and gas exchange, their body structure facilitates the movement of water through the sponge. Structures such as canals, chambers, and cavities enable water to move through the sponge to nearly all body cells.","rendered":"

What you’ll learn to do: Identify the common characteristics of phylum Porifera<\/h2>\n
\"The<\/p>\n

Figure 1. Sponges are members of the Phylum Porifera, which contains the simplest invertebrates. (credit: Andrew Turner)<\/p>\n<\/div>\n

The invertebrates, or\u00a0invertebrata<\/span><\/strong>, are animals that do not contain bony structures, such as the cranium and vertebrae. The simplest of all the invertebrates are the Parazoans, which include only the phylum\u00a0Porifera<\/span><\/strong>: the sponges (Figure 1).<\/p>\n

Parazoans (\u201cbeside animals\u201d) do not display tissue-level organization, although they do have specialized cells that perform specific functions. Sponge larvae are able to swim; however, adults are non-motile and spend their life attached to a substratum. Since water is vital to sponges for excretion, feeding, and gas exchange, their body structure facilitates the movement of water through the sponge. Structures such as canals, chambers, and cavities enable water to move through the sponge to nearly all body cells.<\/p>\n\n\t\t\t

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Candela Citations<\/h3>\n\t\t\t\t\t
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