The valvular structure of the veins, anatomically and physiologically considered, with a view to exemplify ... the wisdom, power and goodness of God, as revealed ... in Holy Writ. The Warneford prize essay, for the year1838 / by Thomas Clarke Roden.

Date:
1839
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Licence: Public Domain Mark

Credit: The valvular structure of the veins, anatomically and physiologically considered, with a view to exemplify ... the wisdom, power and goodness of God, as revealed ... in Holy Writ. The Warneford prize essay, for the year1838 / by Thomas Clarke Roden. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    in the limbs, from the cerebrospinal. The veins are, however, more sparingly supplied with nerves than the arteries; although the right side of the heart appears to be as liberally supplied with them as the left. It may, therefore, be inferred, that veins require less nervous stimulus to perform their functions, being more subject to the operation ot external agencies, than the heart and arteries. With respect to lymphatics, in connexion withLympha- the venous structure, although they do not admit of demonstration, there can be no doubt of their existencek. It has been already observed, that in the struc- Difference J . between ture, course, and arrangement, of the veins, there the arterial ° _ and venous are several particulars, in which they differ essen- tunics, tially from the arteries, independently of that great distinguishing characteristic, the valves, which has been proposed as the special subject of this Essay. They are thinner, more flaccid, less elastic; and are, for the most part, not so deeply seated as arteries, but are comparatively superficial, numbers being situated immediately beneath the integu- ments. They are, likewise, much more numerous ; two veins, in many instances, being found accom- panying one artery; independently of the many subcutaneous ones above alluded to. They are also remarkable for the freedom with which they com- municate with each other ; by means of collateral k “ Praesentia vasorum lympkalicorum nondum quidem ad oculorum sensum evicta est, sed plusquam verisimilis.” Meckel, 1. c. p. 70. C 2