Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Henry S. Badeer"'
Autor:
Henry S. Badeer
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 118:573-576
There is controversy as to whether or not the heart works against gravity in the arteries to the head in the upright position. One view is that the gravitational effects in the neck arteries are counterbalanced by the gravitational effects in the vei
Autor:
James W. Hicks, Henry S. Badeer
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 114:197-203
Various means of driving blood to the head of the Barosaurus with a long neck have been postulated. The multiple hearts concept of Choy and Altman has not been received enthusiastically. We favor the siphon loop concept based on the interaction betwe
Autor:
Henry S. Badeer, James W. Hicks
Publikováno v:
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology. 262:R725-R732
The elementary principles of liquid dynamics are described by the equations of Bernoulli and Poiseuille. Bernoulli's equation deals with nonviscous liquids under steady streamline flow. Pressures in such flows are related to gravity and/or accelerati
Autor:
James W. Hicks, Henry S. Badeer
Publikováno v:
Respiration Physiology. 87:205-217
The concept of 'vascular waterfall' has been used for collapsible vessels in different hemodynamic states which have little similarity to each other from a dynamic standpoint. Examples include (a) flow through large systemic veins entering the thorax
Autor:
Henry S. Badeer
Publikováno v:
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 119:403-405
It has been observed that climbing arboreal snakes have hearts closer to the head than nonclimbing terrestrial or aquatic snakes. The closeness to the head is said to minimize the work of the heart in pumping blood to the head. However, there is ampl
Autor:
Henry S. Badeer
Publikováno v:
Advances in physiology education. 25(1-4)
The flow of blood through the cardiovascular system depends on basic principles of liquid flow in tubes elucidated by Bernoulli and Poiseuille. The elementary equations are described involving pressures related to velocity, acceleration/deceleration,
Autor:
James W. Hicks, Henry S. Badeer
Publikováno v:
Cardiology. 85(1)
Vascular resistance (R) to flow is calculated as the ratio of perfusion pressure between two points (P1-P2) to flow rate (Q). In high-pressure circuits (e.g., systemic), it is justifiable to use arterial pressure (P1) to represent perfusion pressure.
Autor:
Henry S. Badeer
Publikováno v:
Advances in Physiology Education. 25:187-188
AN INVITATION TO READERS The editors welcome readers' contributions in the form of letters about any aspect of physiology education. Please write to the Editor, Advances in Physiology Education , American Physiological Society, 9650 Rockville Pike, B
Autor:
Henry S. Badeer
Publikováno v:
The Physics Teacher. 32:426-427
Autor:
James W. Hicks, Henry S. Badeer
Publikováno v:
The Physics Teacher. 28:558-559