Open Circulation Advantages

Unlike in a closed circulation, no hubs exist in hemocoels. Connections within the hemocoel are direct and bidirectional, and because every point within the hemocoel is potentially alike and potentially connects with any other, hemocoels are not vulnerable to point blockages. We assume all routes for transmission within hemolymph to be identical, although transmission may not always equal physical flow. One example might be a cell creeping over the surface of an organ. As an exponential network, circulation inside the cavity is more stable than a pure scale free network would be. As we shall see, circulation can grow relatively independent of the size of a hemocoel and its volume of hemolymph, and shortcuts may be of indeterminate length (Chapter 10).

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