Question

lo 3.6. the human body has a complex network of ___ that pump oxygen - rich blood from the heart to all parts of the body.
bronchioles
arteries
alveoli
capillaries
veins

Explanation:

• Bronchioles: Part of the respiratory system, not involved in blood circulation.
• Arteries: Carry oxygen - rich blood away from the heart to the body.
• Alveoli: Sites of gas exchange in the lungs (respiratory system), not for blood transport.
• Capillaries: Where gas exchange between blood and tissues occurs, but they receive blood from arteries.
• Veins: Carry de - oxygenated blood back to the heart.

Answer:

B. Arteries