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What is the main purpose of the capillaries in the circulatory system?

Question 6 options:

To facilitate the exchange of nutrients, oxygen, and waste between the blood and body tissues

To pump blood back to the heart

To exchange CO2 to oxygen in the lungs

To filter waste from the blood

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
5 days ago

The main purpose of the capillaries in the circulatory system is:

**To facilitate the exchange of nutrients, oxygen, and waste between the blood and body tissues.**

Capillaries are the smallest blood vessels and are where the actual exchange of substances occurs between the blood and surrounding tissues.