Question

practice it lo 3.6. what is the role of veins in the circulatory system? to transport nutrients from the lungs to the rest of the body. to carry oxygen - poor blood back to the heart. to regulate blood pressure in the arteries. to carry oxygen - rich blood back to the heart. to transport blood from the heart to the lungs for oxygenation.

Explanation:

Veins are blood vessels that carry blood back to the heart. In systemic circulation, most veins carry oxygen - poor blood. Arteries are responsible for transporting blood away from the heart (e.g., transporting blood from the heart to the lungs for oxygenation is done by the pulmonary artery). Nutrient transport from the lungs is not the main role of veins. Also, veins do not regulate blood pressure in arteries.

Answer:

To carry oxygen - poor blood back to the heart.