Answer:
1. Atrial wall are thinner
2. Ventricles are thicker
Explanation:
The atrium and ventricles are the chambers of the heart where the atrium forms the upper two chambers and the ventricles from the lower chambers.
The atrium chambers collect the blood from the lungs (left atrium) and the body (right atrium) whereas the ventricles pump the blood to the body (left ventricle) and the lungs ( right ventricle).
Since the function of the atrium is to pump blood just to the ventricles and the ventricles has to pump the blood to the body therefore the thickness of these chambers varies. Based on these function, the thickness of the atrium is thinner compared to the ventricles.
Thus, Atrial wall are thinner and Ventricles are thicker is correct.
Answer:
These muscles resemble lattice and line the interior wall. The atria's thinner walls when compared to the ventricles are directly related to its function: blood flows into the atria, and very little force is needed to propel the blood to the atria.
