End systolic volume (ESV) â The amount of blood still in the. ventricles after the contraction is complete. End diastolic volume (EDV) â The amount of blood in the. ventricles after they have filled but prior to the beginning of. the contraction.
This is the fastest form of travel for most snakes, but rattlesnakes donât engage in this style of locomotion often. Rattlesnake speeds have not been specifically measured, but they likely travel at about 2 to 3 miles per hour in very short bursts. In comparison, the fastest humans can run up to 28 miles per hour.
Baby rattlesnakes usually do not feed prior to their first winter and may hibernate in adult dens. Average growth for juvenile rattlesnakes is about 10-16 cm per year. Adult growth is about 3 cm per year. Captive western rattlesnakes can live up to 30 years, but the lifespan of wild snakes is thought to be much lower.