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.
Rattlesnakes attack their prey by striking. They strike to inject toxic venom into the blood stream. A three foot snake can strike about 12 inches or about one-third of its body size. The fangs of a massasauga are hollow and the venom is secreted into them by glands.Rattlesnakes can control the injection of venom and sometimes don't use it when they bite because of self defense, possibly saving it only for prey.rop for drop, the massasaugas venom is more toxic than the timber rattler, but because of the smaller volume of venom, a bite would probably not cause severe harm to an adult human. Very few large domestic animals have ever been killed by rattlesnake bites and hogs are usually unharmed because of their layers of fat.