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.
Cheetahs, the fastest animals on four legs, run at an average speed of 50-70 mph. They are built for speed, with front legs that can stretch up to 20 feet in a single stride. Earlier this week, a cheetah called Sarah at Cincinnati Zoo, Ohio, was recorded running 100m in just 5.95 seconds, making her 40 per cent faster than Bolt.