AP BIOLOGY

Detailed explanation-1: -A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart.

Detailed explanation-2: -There are two atria (upper chambers) called your right atrium and left atrium. In addition, there are two ventricles (lower chambers) called your right ventricle and left ventricle. Each chamber plays an important role in your heart’s functioning.

Detailed explanation-3: -Structure of the Heart The heart has four chambers: two upper chambers call the right and left atrium and two lower chambers called the right and left ventricle. There is a wall between the two atria called the atrial septum. There is another wall between the two ventricles, and it is called the ventricular septum.

Detailed explanation-4: -The upper chambers are called the left and right atria and the lower chambers are called the left and right ventricles.

Detailed explanation-5: -The right atrium receives blood from the superior and inferior vena-cava. And the left atrium receives blood from the lungs through pulmonary veins. So, these two are called the receiving chambers of the heart.