. The animans and man; an elementary textbook of zoology and human physiology. ,their beauty of color and pattern, and symmetry of outline,appeal to that inborn love of knowledge in us, as subjects tostudy, admire and enjoy. Sponges.—A bath or slate sponge is simply the skeleton, orpart of it, of a sponge , animal. In life all ^^ of this skeleton is in-closed or covered bya soft, tough massof sponge are fixed, ex-cept when very young,when they swim freelyabout. They arefound at all depthsand in all seas, grow-ing especially abun-dantly in the Atlan- Ftic Ocean and theMediterranea
. The animans and man; an elementary textbook of zoology and human physiology. ,their beauty of color and pattern, and symmetry of outline,appeal to that inborn love of knowledge in us, as subjects tostudy, admire and enjoy. Sponges.—A bath or slate sponge is simply the skeleton, orpart of it, of a sponge , animal. In life all ^^ of this skeleton is in-closed or covered bya soft, tough massof sponge are fixed, ex-cept when very young,when they swim freelyabout. They arefound at all depthsand in all seas, grow-ing especially abun-dantly in the Atlan- Ftic Ocean and theMediterranean. Avery few kinds live infresh water, being found in lakes, rivers, and canals, inall parts of the world. The shape of the simplest spongesis that of a small vase, or nearly cylindrical cup, attachedat its base, and having at the free end a large opening(fig. 53). But most sponges are very unsymmetrical andgrow more like a low, compact, bushy plant than like theanimals we are familiar with. The smallest sponges areonly i mm. (1-25 in.) high, while the largest may be over.
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Keywords: ., bookcentury1900, bookd, booksubjectphysiology, booksubjectzoology
