An alternative sauropod physiology and cardiovascular system that eliminates high blood pressures
Article first published online: 12 APR 2010
© 2010 The Authors, Journal compilation © 2010 The Lethaia Foundation
Volume 44, Issue 1, pages 46–57, March 2011
How to Cite
SIEGWARTH, J. D., SMITH, C. N. and REDMAN, P. D. (2011), An alternative sauropod physiology and cardiovascular system that eliminates high blood pressures. Lethaia, 44: 46–57. doi: 10.1111/j.1502-3931.2010.00221.x
- Issue published online: 12 APR 2010
- Article first published online: 12 APR 2010
- manuscript received on 03/08/2009; manuscript accepted on 02/02/2010.
Siegwarth, J.D., Smith, C.N. & Redman, P.D. 2010: An alternative sauropod physiology and cardiovascular system that eliminates high blood pressures. Lethaia, Vol. 44, pp. 46–57.
The long neck of an adult sauropod has been found structurally unsuitable for high browsing while standing on all four feet. Some juveniles might have used a tripodal stance, but an analysis of the motion of the centre of mass shows a large adult sauropod could not. We propose here that sauropods could have browsed high by sitting, squatting or even kneeling on their hind legs to elevate their heads without a sharp bend at the base of the neck. A large sauropod needs a way to deal with very high blood pressure when high browsing. Arterial pumping is suggested here as a means of avoiding the need for high blood pressure. □Blood pressure, browsing posture, cardiovascular system, form vis-à-vis function, neck length, physiology, sauropods, tripodal stance.