Final answer:
The lungs are not part of the cardiovascular system; they belong to the respiratory system, despite their role in blood oxygenation.
So, the correct answer is D) lungs.
Step-by-step explanation:
The component not part of the cardiovascular system is lungs. The main components of the cardiovascular system include the heart, which pumps blood; blood vessels, which carry the blood; and blood itself, which transports oxygen, nutrients, and waste materials. Although the lungs are involved in the pulmonary circulation by oxygenating the blood, they are not considered a component of the cardiovascular system, but rather a part of the respiratory system.
So, the correct answer is D) lungs.