<span>Mechanical waves....</span>
Answer:
There are four main categories of anesthesia used during surgery and other procedures: general anesthesia, regional anesthesia, sedation (sometimes called "monitored anesthesia care"), and local anesthesia.
Answer:
The geologic time scale is an important tool used to portray the history of the Earth—a standard timeline used to describe the age of rocks and fossils, and the events that formed them. It spans Earth's entire history and is separated into four principle divisions.
Explanation:
White blood cells (D) aid in the immune system to fight infections.
