AP BIOLOGY

Detailed explanation-1: -Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.

Detailed explanation-2: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.

Detailed explanation-3: -The right atrium receives deoxygenated blood from systemic circulation through the superior vena cava and inferior venae cavae. The left atrium receives oxygenated blood from pulmonary circulation through the left and right pulmonary veins.

Detailed explanation-4: -Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.

Detailed explanation-5: -Right chamber of the human heart comprising of the right atrium and right ventricle receives deoxygenated blood from all the parts of the body.