The conversation between human and AI assistant.
What are the main parts of the circulatory system, and what function does each serve?
Interesting! And what about the blood vessels?
The blood vessels come in three types: arteries, veins, and capillaries. Arteries carry oxygen-rich blood away from the heart to the body's cells, while veins carry oxygen-poor blood back to the heart. Capillaries are tiny blood vessels that connect arteries to veins, and they allow for the exchange of oxygen, nutrients, and waste products between the blood and the body's cells.