Blood Pressure, Dr. D. Penney

Figure 06. Distribution curves of the number of collagen fibers that have reached their instretched length versus the degree of stretch of the wall. For the young vessels, half are in action at 60% stretch; for the older vessels, half at 30% stretch. The areas under the curves represents the total amount of collagen in the wall, and this increases with age. Young = 20-40 yrs of age; Older = 80 - 100 yrs. of age.


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