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. 2013 Dec 5;8(34):3249–3254. doi: 10.3969/j.issn.1673-5374.2013.34.009

Figure 1.

Figure 1

Longitudinal tensile stress-strain curve of fetal umbilical vein and middle cerebral artery specimens.

When the stress is 16.0 kPa, the stress-strain curve of specimens in the two groups shows an exponential relationship. The strain of the fetal umbilical vein was higher than that of the middle cerebral artery. When the stress exceeds 16.0 kPa, the strain of specimens in the two groups increased rapidly and the slope of the strain curve increased as the strain increased, but the stress-strain correlation is nonlinear. The stress-strain curve of fetal umbilical vein and middle cerebral artery is similar.