Blood pressure gradients across species

Submitted by Juli Uhl on

A scientist is studying blood flow in the aorta of three different animal species; a zebra, a camel, and an elk. She found that the composition of the blood was identical in each animal as well as the diameter of their aortas, but the rate of blood flow through the aorta was different. The scientist measured the following pressures at the beginning (i.e., ascending aorta) and near the end (i.e., abdominal aorta) of the aorta.

Which animal has the greatest flow rate (L/min) of blood through the aorta?

a) Zebra
b) Camel
c) Elk

Explain why the animal you selected has the greatest flow rate (L/min) of blood through the aorta.

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This material is based upon work supported by the National Science Foundation (DUE grants: 1438739, 1323162, 1347740, 0736952 and 1022653). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.