Lectures on the comparative anatomy and physiology of the invertebrate animals : delivered at the Royal College of Surgeons . nd the condition of thepulsating dorsal sanguiferous tube inthe Anellids. In the perfect Hexapod Insect, theheart {Jig. 152) has the appearance ofa series of slightly conical segments(rt), partially sheathed one upon theother: lateral apertures (c, 6) existat the sides of the intus-susceptions,where, in fact, valvular folds (c, d)of the inner tunic do project into theinterior of the heart, and, with thesemilunar valves (c), partially divideits cavity into so many separa
Lectures on the comparative anatomy and physiology of the invertebrate animals : delivered at the Royal College of Surgeons . nd the condition of thepulsating dorsal sanguiferous tube inthe Anellids. In the perfect Hexapod Insect, theheart {Jig. 152) has the appearance ofa series of slightly conical segments(rt), partially sheathed one upon theother: lateral apertures (c, 6) existat the sides of the intus-susceptions,where, in fact, valvular folds (c, d)of the inner tunic do project into theinterior of the heart, and, with thesemilunar valves (c), partially divideits cavity into so many separate cham-bers. The whole of this part of theheart is included in a saccular venoussinus (a, c), from which the bloodpasses into the interior of the heart,and, by the disposition of the valves, y?^M> it is at once prevented from returning - r^> into the sinus, or passing in any other Dorsal heart ot stag-ueetie. direction in the heart than towards the head, or into the next chamberin advance of that by which the fluid was admitted. The number ofvenous orifices varies in different insects:—in most species there are.
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1850
