Answer:

a. arteries

Explanation:

The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues.

Answer:

a

Explanation:

The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart. Arteries begin with the aorta, the large artery leaving the heart. They carry oxygen-rich blood away from the heart to all of the body's tissues.