The Arms

Below is the subsystem that solves the equations for the arms. It is identical to the subsystems for the head, legs, and trunk except for the parameters used.

Block diagram of the arms subsystem

Figure 1. Simulink block diagram of the arms.


Physiological notes:
  • The circulatory system in the arms can be affected by external heat sources such as working muscles, through the variable fe, although for the basic model, such sources are ignored (fe = 0).
  • Ambient temperature is included with the ta term, and its effect is proportional to the arms' area, A, and a thermal constant, K.
  • Note that in the current model blood flow effects heat flow, but heat flow does not effect blood flow.
Simulation notes:
  • The Goto and From blocks F5i and P9 are connections to other circulatory systems where the information flow is opposite of blood flow. Using the Goto and From blocks for these connections allows the connections to be made "below the surface", thereby keeping the main block diagram (physbe) uncluttered and less confusing.
  • The Goto blocks, P5i, V5, and P5 allow key output information to be passed directly to the Analysis Subsystem, where it can be managed in one central location.
  • The line labels are used to keep track of variable information, making the flow of information easier to track.

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