The lower chambers of the heart are called the: A) arteries ...

[Charlie]

The lower chambers of the heart are called the:
 
  A) arteries
  B) veins
  C) ventricles
  D) atria

Question 2

Select the prefix that means against.
 
  A) anti-
  B) ab-
  C) a-
  D) ad-

[stillxalice]

Answer to Question 1

C
Explanation: The smaller upper chambers are the atria. Arteries bring oxygenated blood away from the heart and veins deoxygenated blood toward the heart.

Answer to Question 2

A
Explanation: Look closely at the spelling of aB-, away from, and aD-, toward. Both are directional terms. The prefix a- means without or absence of.