The fortune teller said that rattlesnake life _ What does rattlesnake stand for?

Rattlesnake is a tube-toothed snake, and snake venom circulates in the blood. Generally, the body length is about 1.5~2 meters. The body is yellow-green, with diamond-shaped black-brown spots on the back. There is a string of horny rings at the end of the tail, which is the residue after molting many times. When encountering an enemy or moving quickly, the tail ring of the tail can swing quickly, 40~60 times per second, and it can make a loud noise for a long time, so that the enemy is afraid to approach or be scared away, so it is called a rattlesnake. Here is a cavity surrounded by keratinized skin left after molting, and the inside is divided into two annular vacuoles by horny membrane. Therefore, when the rattlesnake's tail wobbles, an airflow is formed in the cavitation. As the airflow oscillates back and forth, the cavitation makes a "rattle" sound, which is why the rattlesnake is named.