Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] CCELENTERATES 201 of the cavity. Part of the cavity, as in the hydra, is given up to digesting the food. Food, which is often taken ahve into the body, is killed by means of stinging cells found in the long threadlike tentacles developed near the base of the cavity. The partitions or mesenteries, as they are called, are usually double. These perform in the coral polyp, which is like a mini- ature sea anemone in structure, a very imp
Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] CCELENTERATES 201 of the cavity. Part of the cavity, as in the hydra, is given up to digesting the food. Food, which is often taken ahve into the body, is killed by means of stinging cells found in the long threadlike tentacles developed near the base of the cavity. The partitions or mesenteries, as they are called, are usually double. These perform in the coral polyp, which is like a mini- ature sea anemone in structure, a very important function. Coral} — (Madreporic coral or our common Astrangia may be used for observations.) Test with a drop of hydrochloric acid. What substance is present? Ex- amine a piece of the ordinary white branching coral (madre- pore) with the hand lens. Notice the little holes at intervals over the surface holes ? A branching madreporic coral. Do you find little partitions in these
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