Which of the following is NOT one of the three components of the circulatory system?

_________ are eight-legged arachnids with a venom gland and stinger at the end of their tail.

Fill in the blank(s) with the appropriate word(s).

Which is an advantage of using the argon beam coagulator?

a. Increased air embolism b. Beam weight lighter than air c. Patent return electrode not required d. The argon beam spares surrounding tissue