The arches bear on the convex outer side the delicate arborescent gills, and on the concave inner side develop a membranous septum with vermicular perforations, a special sifting or filtering contrivance through which the water absorbed by the mouth has to pass before reaching the respiratory organs of the branchial apparatus. [Please select]
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The follicular appendages of the branchial arteries present remarkable differences in their external appearance. [Please select]
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The five branchial arches are represented by the ceratobranchials, several of which are preserved on K. [Please select]
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The abdomen ends in three long and many jointed stylets, and there are the usual "false branchial feet" along each side of the abdomen. [Please select]
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In fact, on distending the vena cava with air, it is found that the four branchial arteries traverse these septa, and that the appendages in question are diverticula of their walls. [Please select]
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