PSI Barbering Practice Exam

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Which of the following carries blood containing waste products back to the heart and lungs?

Arteries
Veins
Capillaries
Venules

The correct answer is: Veins

Veins are responsible for carrying blood containing waste products back to the heart and lungs. This process is a critical part of the circulatory system. After delivering oxygen and nutrients to the body's tissues through arteries, the blood becomes deoxygenated and accumulates waste products, such as carbon dioxide. Veins collect this deoxygenated blood from various parts of the body and return it to the heart. Once the blood reaches the heart, it is then pumped to the lungs for re-oxygenation, where carbon dioxide is exchanged for oxygen in a process known as gas exchange. This function is essential for maintaining the overall health of the body, as it ensures that waste products are effectively removed and that fresh oxygen is supplied to tissues. Capillaries, while they play a crucial role in the exchange of oxygen, nutrients, and waste products between blood and cells, do not transport blood back to the heart. Similarly, arteries are responsible for carrying oxygen-rich blood away from the heart, and venules are small vessels that collect blood from capillaries and merge to form veins, but ultimately it’s the veins that are tasked with returning the blood to the heart.