Abstract:
The study investigated the effect of the angular position of the head on the
blood flow in the jugular vein of giraffes. The vein considered is elastic and
collapsible such that its cross-sectional area is not uniform. Transmural pressure causes the blood to move along the vein. Mathematical equations describing the flow were developed, and the vein was considered to be inclined
at an angle φ to the horizontal. A finite-difference scheme was used to solve
the equations of motion for the flow. The results are presented via relevant
tables and plots. Our findings show that a change in the position of the head
causes variation in the external pressure, which in turn causes variation in the
cross-sectional area of the vein. Moreover, a drop (or increase) in the inertial
pressure of the blood may cause the vein to collapse (or distend), which again
triggers a change in the pressure
