AFAA Personal Trainer Certification 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer highlights that in a healthy heart, oxygenated blood is primarily carried from the heart to the organs and muscles. After blood is oxygenated in the lungs, it returns to the left side of the heart, specifically the left atrium and then the left ventricle. From the left ventricle, oxygenated blood is pumped out through the aorta, the main artery, which branches into smaller arteries that distribute oxygen-rich blood to various parts of the body, including all of the organs and muscles.

The organs and muscles require a constant supply of oxygen to function properly, making this pathway vital for sustaining life and physical activity. The delivery of oxygenated blood ensures that these tissues can perform their necessary metabolic processes, helping maintain energy levels and overall health.

While oxygenated blood also goes to specific organs like the brain and kidneys, it does not exclusively supply these areas. Instead, it supports the larger system of organs and muscles as a whole, reflecting the more collective nature of the circulatory system beyond isolated regions.