Question

1. the upper chambers of the heart are called the:

∘ atria
∘ pericardia
∘ bicuspids
∘ ventricles

1. the lower chambers of the heart are called the:

∘ bicuspids
∘ pericardia
∘ ventricles
∘ atria

Explanation:

Question 1

The heart has four chambers. The upper two chambers are called atria (singular: atrium). Pericardia are the protective sacs around the heart, bicuspid is a type of heart valve, and ventricles are the lower chambers. So the correct option is atria.

The lower chambers of the heart are known as ventricles. Atria are the upper chambers, pericardia are protective sacs, and bicuspid is a valve. So the correct option is ventricles.

Answer:

A. atria

Question 2