Question

multiple select question select all that apply what are the upper, thin walled chambers of the heart? left ventricle left atrium right atrium right ventricle

Explanation:

The heart has four chambers. The upper - thin walled chambers are the atria. The left atrium and right atrium are the upper chambers of the heart, while the left and right ventricles are the lower, thicker - walled chambers.

Answer:

B. Left atrium, C. Right atrium